Assassin questions. A LOT of them.

Those stars are so incredibly hard to get, none exist as of writing this. Getting a claw is a random chance from CWK's exchange quest, so you may get a dex claw.

Of course, that dexless claw and the Balanced Fury stars are very good.

Not exactly, a 'ravens wing' can be obtained from the exchange quest, which I believe requires DEX, but you can then upgrade it with one of the three taos to UR CHOICE of Dusk/night/dawn ravn's wing. One of which (I forget which) is dexless, has 5 less WAtt, but has a faster speed just made a dexless sin and, gotta say, the damage is smexy