Honestly, In my opinion, The Talia anti defense problem really only lies with DD.
I do believe sin is significantly weaker then most classes in this server with the exception of Archer.
There are so many other avenues for getting defenses that it seems that rogue suffers the most.
I've now played Priest, Warrior, Archer and Sin on the server and i can say out of all of these classes rogue in general definitely seems to be suffering the most. I didn't play much archer outside of a 8 man archer party where i feel like 8 DP's gets the job done.
I can't say as a warrior that i've ever thought "Man this guy is wearing talia, that's why i can't kill him"
Who knows though. I do think it's hard to balance with the server being an elemental damage server.
With that being said, I do think if you have decent wings and items, talias as a whole is a little overkill on top of all the other defenses you get from these customized items.
I'm okay with any conclusion though.