Here goes…..
Viks - I would say try to keep them alive; while it is a great fallback being able to summon another one, it is expensive and due to all of the conditions you need to pull it off, rather tricky. To be honest though, I have played the Viks a lot and I have never wanted to or needed to summon another one.
If I am running a traditional Viks crew then I take a hatful of soulstones to keep them alive, although more recently I have been going very Freikorp heavy and the Librarian work very well….. just make sure you keep her safe as she draws a lot of fire. And also remember to keep a card in your hand for when she activates otherwise she is paralysed…… I nearly forgot in my last game.
Ronin - I think you have hit the nail on the head with these and there is not much left to add. They are very good.
Gunslinger - he is incredibly good. Obviously his shooting is top drawer, but he is also great at card control due to suppressive fire. He is also surprisingly good at melee due to gunfighter. He is a bit of a fire magnet, but due to Bullet Proof he should be able to stick around for a while (although I always forget that he has this……)
Student of Conflict – I like the student of conflict, but a lot depends on the strategy. If you have a strategy that involves you getting up the board ASAP, then he tends to get left behind as his ability to give fast is an all action meaning he can’t move…. Either that or he just moves up the board with the rest of your crew and only gets to use his ability once a game !
However if your scheme involves you holding up in your deployment zone or defending a position and not moving, then he is very useful.
Thinking about it, I guess he is slightly limited in a Viks crew as there is no point in him using magical extension…..
Misaki – surely she is worth including just for the model alone !?! Offensively Misaki is brilliant, but she is very fragile. I have had take out McMourning in a single round of combat, but have also seen her go down very quickly herself. Her versatility is fantastic, and she often takes un-prepared opponents by surprise... some people don't expect her blasts and I once had a Tina player think she was safe behind a wall of ice pillars only for Misaki to tip-toe through it and smack her about with the bisento
Taelor – she is an absolute beast in combat and as hard as nails too. The only problem I would say is that she is a little on the slow side, especially if you are playing a list which is heavy on Ronin.
Hamelin – it seems that he is either the star of the show or a complete waste of space, but I think I could be playing him a little too aggressively at times….. That and I have a horrible talent at overestimating how far his spells can reach. He does bring some much needed variety to a Viks crew, however it is a real shame that he can only cast Obey once per turn (or twice if you can get his trigger off) and the real issue is that he competes with the Viks for masks, which you want to save up for getting off their whirlwind trigger.
Bishop is great, but as Wodschow mentioned, he is very expensive. You can have Bishop for 10ss, or Von Schill for 9ss….. I would go for Von Schill any day of the week.
Sorry if that is a bit vague – if you want any more details let me know !