Jaffar?

I recently got a Jaffar as well, neutral nature, and didn't really expect to use him a lot, since everyone talks about how weak he is compared to Kagero. But first thing I did was give him Poison Strike and Savage Blow and I've been having a lot of fun pairing him with Olivia and watching him chip entire teams down while seriously stabbing away at whoever he targets. Jaffar can kill some things on his own but he definitely has more use as a team player; he'll be best with units who can reposition him away from danger and also strong units who can get KOs on the enemies that he weakens. If you use him, you'll want to put him on a team with good synergy.