I’ve had a lot of success with Kraken. In fact, my only loss with him came when I tried to evolve to stage three and my character ended up forzen for the remainder of the match. This was the only time I tried to stage up to level 3, all of my wins came at stage 2.
When searching for food to evolve and trying to avoid the hunters its still a good idea to sneak if they are not nearby or don’t know where you are…these is just no need to risk telegraphing your location to them. When you are trying to escape from them use your flight to your adantage by flying over cliffs, buildings, acid pools, etc… You can clear these obstacles easily, they have to either go around or jet pack over them. If you are in an area with not much cover then fly low to the ground, if you fly high in the sky then you are very easy to spot. Sometimes if the cover is very low you are better of to run on foot. Remember to use water to your advantage as well, you still leave prints on the ground even when you are flying.
When in combat the most important thing is to always stay in the air, the higher the better. This really makes it difficult for the hunters to do any decent damage to you. Also, as others have said, you get a great veiw of the battle area, plus your lightining strike and banshee mine ablilties are at their best when you are up high and can rain down on them. If you end up harpooned you need to break those immediately as they will pull you to the ground.
When using your banshee mines you want to spread those out a bit, don’t fire all three at the same spot. The reason for this is because when one mine explodes it will push the other mines away. You don’t necessarily need to shoot these directly at the hunters, just fire them in the area that they are fighting in and the hunters will eventually get close enough to them for them to activate and find their target.
Lightining strike is your heavy hitter, use this on a hunter you want to focus. It does have some Area of Effect ability but usually you are best to just aim for one hunter instead of trying to hit several at once (doing this will usually cause you to do minimal damage or miss entirely).
Vortex blast does OK damage once you get more than one point in it, but the real beauty of this ability is its knock back. Did that Hyde player wise up and perch himself on a ledge so he can hit you with his flame thrower? Send a vortex his way. Hank shielding the hunter you want to focus down? Vortex. Vortex also chains very well with lightining strike, hit them with the vortex first them immediately use lightining strike, it makes the lightining strike exceedingly difficult to dodge.
And finally we come to aftershock, you’re big Area of Effect attack. I never put just one point into this ability; the damage at level one isn’t too bad but the range is terrible (they have to almost be touching you for it to hit). Once you get at least two points in it though it becomes a soild ability. A lot of people won’t take this ability because it requires you to go to the ground with the hunters (normally a big no-no) for it to be effective, however I think that the damage and range on this ability makes it worth the risk. To get the most out of aftershock you want to activate it while you are in the air, then hold down the sneak button to quickly drop to the ground on top of your target(s). At level 3 it hits pretty hard and over a fairly large area…if you land it on multiple hunters it will defintetly give the medic something to do. Its great to use when the hunters bunch together and its also a great finisher if you are focusing someone. When aftershock goes off it should break/destroy any harpoons, harpoon traps, sentry turrets, etc in its range…just make sure after you use this ability that you immediately get yourself back in the air (best way to do this is hit your air boost while not trying to move in any direction…this makes you boost straight up).
This pretty much sums up how I have been playing the kraken. I haven’t come close to a legitimate loss playing this way (though I don’t think I have come up against anything better than an average group of hunters as the kraken, so don’t put too much stock in my claim of kraken supremacy).