Quick Gear Question

Hello there. I'm a new thf and really love the job. I've spent the last month or so gearing it up as best as I can but I have a question about something in particular. I'm very bad at this sort of thing but I'd like bring it to you guys rather than someone in-game.

A few weeks ago I acquired a Light Belt, which as far as I know, works with Evisceration. My question is this... Should I be wearing this for SA and TA weaponskill, or stick with +DEX/AGI waists? Inside and out of abyssea. I use it right now on regular WS, but not sure if I should be on SA/TA or not. Thank you for reading.

P.S. When not pulling, do you prefer the Raider's boomerang or Crit dmg tathlum?