Thunderstorm is a bloody thing. the kraken has a NEGATIVE 20% resistance to air. Thunderstorm is a multi round area of effect condition that casts multiple dazzling bolts on steroids on everything. here is how i won the fight with a two man lone wolf party, a rogue and a aero/geo summoner who never actually summoned anything.
Put the summoner on the cliff behind me while the trash engages lucian, a gheist, and that annoying as hell cleric/metamorph magister and conserve 2 ap. send the rogue to die. with one ap to spare for re-positioning, rez the rogue out of sight and stealth them from out of combat. if re-positioning wasnt required (shouldnt have been) re-position the mage then stealth. fight ends when the neutral faction dies on the following turn. sneak to uber high ground where braccus always bloody goes for superiority. stab him from out of combat with mortal blow (if you have a ranger, assassinate is lovely. now you are fighting BR and the kraken alone, no trash. mage casts thunderstorm which now suddenly has highground vs the kraken. As previously mentioned, it is highly susceptible to CC. Which includes stun. Which is an air aligned status ailment... delivered by air magic. I mentioned to automatic 20% boost to damage after ALL other modifiers that air damage gets versus the kraken right? Fuck it's aoe, the damn thing cant do anything when its permastunned/dead