I can't figure out if it is worth upgrading to a Hero's Belt of Casting from an HQ Penta-melded Vanya Sash of casting? I haven't had much luck with the Allagan Belt.. just saw it drop for the first time this week and lost the roll to our BLM...

HQ Vanya Sash with melds: VIT+9, INT+9, DET+8, SS+12, ACC+12, CRIT+12
Hero's Belt of Casting: VIT+14, INT+13, ACC+11, SS+16

Also how much INT becomes more valuable than Crit and worth losing Crit for? Because I also haven't gotten i90 pants yet and until I do I'm unsure if I need to stick with my DL or if I can throw CT's Crimson pants on

I have Currently:

Weapon: Zenith
Head: AF2
Body:AF2
Hands: AF2
Belt: HQ Vanya x5melds or Hero?
Pants: DL or Crimson?
Feet: AF2
Neck: Hero
Earrings: Allagan
Wrist: Hero
Ring1: Vortex
Ring2: Hero