All situational. Echo could be used to harass players with Yokai for a bit, and has some decent weapons. Capitao (at least in my personal opinion) has great weapons, but a definite situational special. BlackBeard is alright in ability, although you'd have to focus on recoil in his weapons, of course. Twitch has better variants of those weapons. Buck is the least situational, but again, the weapons are recoilish, although more easier to handle than Blackbeard. Hibana has okay weapons for an attacker, but done right, a pretty nice special. Add maybe Thatcher or even Glaz, it could work out pretty nice. Caviera mostly has to do with stealth and knowing the map enough to be able to sneak to enemies with her Luison. Mira is mostly situational, but a good nitro cell could kill anyone trying to peer in the hole. Jackal is okay, and his weapons are okay. Nothing good, but nothing bad. All in all, it's whatever playstyle you think most suits you pal.