I have Waver so he will be fine. She does charge faster on her own, but he hits waaaay harder, especially when he lines up his boosts (attack boost, NP boost, and Buster boost/crit stars, whew)) plus his 8(!) hit NP mean I will finally have an efficient 2 round farmer since he will be good at using all those stars the round after naturally. Plus since his NP also has -def on it he'll be able to help knock some bosses around too.
Iskandar and Drake are in the same tier since what one doesn't do the other does, but since he's so OTP with Waver canonically and mechanically, drawing Isk would work out real, real gud for me.