Amongst many other factors, foresight plays a big role into maximizing your potential as a Warrior, it is time we go over some tips and tricks that you can use in general to your advantage.

First, animation cancelling. This is particularly important in D-Stance where Block cancelling plays a huge role, but also applies to A-Stance with Blade Frenzy, Aerial Scythe, Death from Above, and Evasive Roll. If you have to use a skill with long ending animation, and if either of those skills is up, and not blocked by another one which has priority over it, (like Blade Waltz as a BD chain), then you can use them to cancel the ending animations of skills with long ending lag like Torrent of Blows, Reaping Slash, Death from Above itself, Blade Frenzy. You will play more fluently and get a little advantage in Edge stacking speed. But keep in mind, you have to evaluate if the situation allows for it, or if there maybe is a better option available.

For quick movement, you can combine a number of skills to get outside of Bosses' attack range. A commonly used technique is Rising Fury First hit into Leaping strike, for when you have to traverse a larger distance quickly.

If you need a quick burst of movement to just get out of something or help with a mechanic, either Rising Fury or Combative Strike work well. The latter of which for example can be useful if you have to take a sphere in RMHM.

Backstab can also be used at moments where you have to get back to the boss quickly. And is optimal when you are not at 9 edge or higher. It will take one of your high cooldown 2-edge fillers, but as we established, you should always have another 2-Edge Filler ready to take the spot. Just note that in this situation, Backstab gains a lot of situational priority.

If you are about to facetank something, and unsure whether or not you will survive, remember that many of your skills have an innate 50% damage reduction that you can make use of. So if you have a Blade Draw chain available, for example, and are expecting to take a heavy hit, you can instead use Rising Fury -> Blade Draw as a higher priority chain in order to take advantage of the damage reduction.

Other than losing a little time by using a slower Blade Draw chain, nothing changes, you still gained 3 edge, and can continue your edge-stacking procedure as normal.

However, if after this you still have a second cast of Blade Waltz up, you might want to use it up soon so it is off cooldown again when you need it. That means, depending on the number of your current edge, you would have to use it up for either Blade Waltz -> Rain of Blows, or combine it with any other Edge corrector to get a 2-Edge Filler. Make sure to make use of its animation cancel property that we mentioned earlier if you have to use it that way. For example:

If you are at an uneven number of Edge however, you can simply use Blade Waltz as an Edge corrector in this case.

Following that, another little, but important tip in regards to Blade Waltz is to use both casts of it relatively close to each other manage the cooldown better. As the cooldown only starts after the second cast, you essentially lose HPM (and a valuable chain/filler for your next stacking process) if you keep the second cast till the last second. This is especially important since most of the time you want to use Blade Waltz as a chainer for Blade Draw. If you decide to not use Blade Waltz at all after not resetting, you lose 1 edge per Scythe stacking process in this situation. If you decide to use it too late, your Blade Waltz will be unavailable. So, final conclusion is to always get rid of both casts of Blade Waltz as fast as possible.

An example of what you can do in a 0 Reset scenario that involves the use of Blade Waltz as both a chainer and animation cancel involves is if you combine it with DFA and Rain of Blows. This is however just one of many possibilities, and every Warrior can go about this differently. I personally do not recommend this exact usage either, but it's just to show one of many possibilities that you can try out.

Another little tip, if you need to run out of a mechanic at 10 edge, or in Aerial Scythe's case, 8 edge, and weren't quite able to use your Scythe, you can use leaping Strike to either chain directly into your Scythe, or to cancel it out into your Aerial Scythe.

By this point you probably can guess that most of the Tips are regarding knowledge of each individual skills function. So long story short, if you are aware of what your skills are capable off, you will be able to improvise yourself if the situation calls for it. For example, it helps a lot if you know how much a skill moves you forward and if you can still hit it and stack the edge you gain from it if you use it from a distance.

The general consensus is to follow your priorities, but in some cases, the situation can make certain skills more valuable than others.

Another small tip is to get used to Aerial Scythe's timing at which the first part stacks 1 edge. If you use the second cast too early, you won't stack the 2 edge, if you use it too late, you basically waste time. Practice it on the Ghillieglade crystal if you must.

Another repeat from earlier on, if the boss is being a ballerina - turning around a lot, feel free to stack your edge from the side until either the boss holds still, or, if you are fast enough, are able to Scythe. As mentioned earlier it is possible to otherwise lose DPS if you are unlucky with Attack-Speed procs because while rolling, you deal literally no damage, and lose time that you could use to stack your edge more quickly. Your most important skills are as we have established many times, Aerial Scythe and Scythe. But keep in mind, in general, it is preferred to be at the back of the Boss whenever you can. Personally, I also back-chase many bosses deliberately. A situation where this may be useful however is for example Malgarios' triple spit as he may turn around a lot during this and you might be spending more time chasing the back than DPSing the boss. Generally, once you know the Boss is going to hold still, it is safe to chase after the Bosses' back without having to worry about any DPS loss.

As for the Traverse Cut buff, since with the addition of Blade Waltz, CS -> Traverse -> BD has been pushed into even lower priority on the Blade Draw chain list, you might have to now sometimes use it fully outside of Deadly Gamble to keep it up. You might even consider pre-stacking it in boss fights where you can, but keep in mind that doing so might accidentally proc your crit dragon/phoenix/etc. buffs. Another, and in my opinion more recommended and practical way to keep the buff up at all times is to sometimes weave in a Traverse cut before a Blade Draw after using Blade Waltz. So, in essence, this would look like this:

This can also be done once while in Deadly Gamble once the Shadow of the Tempest II buff is down, as this is where you might start running into problems with your Cooldowns, and Traverse Cut can help ease it up a bit. Generally speaking though, I do not recommend  trying to stack your Traverse Cut forcingly, especially in Deadly Gamble, where you are better off using Blade Waltz/Combative > Rain of Blows if your Blade Draw isn't up yet. 

Try to keep it up naturally, and prioritize CS -> Traverse -> BD or weave in a Traverse Cut after Blade Waltz before chaining into Blade Draw to keep it up if you see that your Traverse Cut buff might be running out.

Regarding Aerial Scythe outside of Deadly Gamble, you can use the full cast of it even at 10 edge, as the first part of Aerial Scythe already yields high base damage. This can be used as a buffer for other skills. However, it is not necessary and you can skip it as well if you know how to go on about without that buffer.

Another trick, not just for Warriors, but almost every class, is to have a TERA item with double cooldown reduction stats that you can use to pop DG at the start of the fight, and switch back to your normal weapon before attacking the boss. This will give you a 9 second advantage in cooldowns for the second Deadly Gamble.

Lastly, don't be picky in regards to Blade Waltzes crit factor boost. As we already have established, the actual gain from it is that it "only" doubles your base crit factor for the next skill, or in other words, your next skill will have +52 extra crit factor. Apart from Blade Draw and Scythe at too low crit factors, no skill really benefits that much from that extra crit factor. Every other skill either has an improved/guaranteed crit chance, or is only a minority of your total damage.