Ok, what Odysseus said is true. The fcr works on an assassin, but NOT on traps (That would be IAS). The % light damage increase does NOT work on the traps because the traps are considered minions and not a "spell" or "attack". The only reason you would want to use Griffs on an assassin is if you are making a pure Light Trapper with a 105bp for FCR. You would want that BP for your Mind Blast (MB) skill. That skill is what will lock an opponent in your trap fields. For future questions please post
here.