Greetings Xelnok,
I will try to give some feedback based on experience of DNC in Endgame and please note that each server got their own paradigms to deal with "Meta"
I picked up warrior a few months ago and have been working towards making an Ukonsavara
WAR is a great job over all, its excellent in endgame content and adds a lot of power to the group during zerg.
However, when it comes to weapons you're faced with many options based your party's strategy.
A-If going multi-skillchains route on something then GA is the way to go and Uko/Chango won't fail you there.
Uko is a solid weapon with a sick aftermath, you wont be disappointed with it especially if you have an aftemath TP set [C.rate+Multi].
B-More often than not, one can safely assume that most setups that includes WAR go there with the intention to Zerg things down so quickly.[Players want things done fast and without hassle] ergo GS comes to mind.
The real question is, can you still manage to do this without REMA on WAR? the answer is definitely Yes.
You basically have 2 non-REMA GS's that can do it with ease.
1-
Montante+1
2-
Raetic Algol +1
**Preforms best in Escha Zones and/or if you have a form of refresh
You can also check out the discussions in WAR forums and I'm 100% sure that
Saevel can help a lot in that regard.
My biggest worry is that dancer still kind of has a stigma against it and it might be harder to get groups for end game as a dancer with a twashtar over an Ukon warrior.
Here were things get tricky, I fail to see the stigma associated with DNC... I've played DNC since release and before fTP modifications and never faced an issue with going as DNC to almost anything.
Best guess is:
1-DNC is a very demanding job when it comes to preforming your best; therefore, many people shy away from it because it requires a lot of thinking and fast reactions to JA's [It is immune to Bandwagon].
2-Because of how its designed.. if you don't cut times of JA's spam you will hurt your DPS by quite a margin.
And for some reason I don't think you have that issue.
DNC is an excellent 1H DPS job, I personally think its the best between 1H in multi-skillchain approach and even in zerg if you use Terp-PK spam.
I dont want to step into the 2H realm and start comparing it to them, but based on my personal experience and after a zillion fight along side 2H jobs I think its a force to be reckoned with.
Many capped situations I was about 1-5% away from Top and in very few instances I get to beat them [usually with Grand Pas+ Trance]
DNC is essential to 3 Resi HELMs, its the fastest job to create TP without mele and can dish out insane damage by using /THF Sneak Attack and Climactic Flourish.
Would I be able to do all that content as a dancer with a twashtar mainhand in today's Asura meta?
As of late, Twashtar is by far the best Off-Hand.
As for Main-Hand:
1-Aeneas/Twashtar is the best combination to use if going multi-skillchain route.
2-Terp/Twashtar is best in pure Zerg route spamming PK at 1k but Aeneas/Twashtar is very close to it.
3-In longer fights Twashtar/Aeneas is best by a good margin (5-7)% especially if you use AM3 TP C.Rate Set.
4- Twashtar/Taming Sari is best while /THF and focusing on forced crtical rudras in longer fights that requires no mele or needs huge spikes in DMG.
5-There is a creeping combination that might end up being the best DPS overall which is Twashtar/Raetic Dagger +1 in most situations.
It gets the lowest Delay possible with a very high TP generation rate and overflow.[I have yet to get my hands on that Raetic]
So in conclusion, the answer is yes you can with Twashtar Mainhand while you climb your way up to Aeneas since 3/5 scenarios require you to main hand it.
And you still get to use it as best offhand in 3/5 scenarios.
One last thing, many often forget or don't know how powerful DNC is in endgame content:
It can debuff enemy with -23% defense down the whole fight, lower its evasion by 44 and lower its magic evasion by 30.[it stacks with everything btw].
The real kick however is giving party 14% C.rate [every DD job will thank you for it!] and helping with heals in oh ***moments along side the amazing Haste Samba....
Since we will be spamming Dyna to make new weapons or upgrade the long list of REMA's [till the end of times]... Dancers will be needed more than ever to help alliance make things way easier for the sole reasons I mentioned above and the nerf to GEO Bubbles there.
My last question is about duoing content with a geo on dancer vs warrior. A geo+warrior pair is really good at brute forcing through nms, how well would a dancer compare against some of the t1 t2 escha nms?
Aside from NMs with dreadspikes/spikes or are strong to piercing You can safely clear everything there.
DNC is an excellent soloer with very high rate of survivability.. You can literally fight/recover forever with it ever since it was released.[Also Fan Dance is broken].
Both can clear effectively with one of them having more edge in survivability.