game breaking.. what? you know addle lands on almost every mob right? (even Pil) it slows the mobs casting time so you can easily stun it's spell. and ya blu has about 4 or 5 spells to lower TP. i would think an amnesia spell similar to the current Break spell would fit nicely tho.

as for merits i just put 5/5 slow2 as it will typically land on most nms and slow is always nice. normally when i play rdm its just for VW or Abyssea so we need the mob alive for triggering. however pil really is a pain :P