I don’t play much of incursion or meltdown, because if I don’t have a group and cant talk to the other players, chances are we’re going to lose. Especially in meltdown.
If you are playing capture though, my fave gametype, I can tell you that a sniper vs kelvin is already dead. Depending on how many ways I have to get over to the sniper, I’ll either sneak up on them, or if I really need to, sublimate up and stun them. At this point, use your right trigger melee to deal loads of damage to them as they run, and if you can in the right situation, try ground pounding them a little to get them stuck in corners (don’t try this if you don’t think you can, it may hit them forward enough that they can get away). Make sure you keep chomping and they will die, even if no teammate is helping you, the kill is basically guaranteed. The important thing is to keep chomping the enemy while you fight them as much as you can to keep yourself alive with that bonus shield, as well as to deal a lot of burst damage to them.
Basically, you really can do that to anyone. If someone tries to flee in a group fight in capture (like a 3v3 near a capture point) Sublimating and chasing them down with a stun is the best move. If you can reach them though and you know that, do not sublimate until you are closer. If you notice right away and want to freeze the whole fight before you go to kill the flee-er, sublimate as fast as possible. I think the +3 second after each hit really helps with this, however, the mutation for cooldown reduction is really nice as well.
The nice thing is most rath players and galilea players will try to 1v1 you, and they can’t. Well… they can, if they’re well timed, but usually they can’t. Activating sublimate doesn’t make you invincible to everything, and you can get stunned, at least during the first seconds of activation, so good players will shield throw you or knock you up in time to make you waste thatt sublimate.
It’s good to remember that kelvin is something between a surviving dps like shayne and aurox and a tank. He starts off like S&A but as time goes on he absorbs more damage I think. He is NOT a damage soaker though, and should never be played like one.
Also, remember that galt is your worst enemy. Stealthed stun mines WILL stun you in sublimate, and he deals a lot of damage. Basically, if he stuns you with one after you try sublimating, you are dead. If he doesn’t, you had the damage over him, and he should die.