For all monsters, getting those early domes and doing lots of damage are important. You need a Trapper that knows what they’re doing and can predict the monsters movements. Your team needs to help by fanning out a bit and letting Trapper know which way the monster is moving. The Trapper needs to throw good domes that will favour you, and (where possible and appropriate) make the domes small.
You need to get good damage done in the early stages, otherwise it’s going to be a very hard fight. Against a Kraken, you can usually take anywhere from 1 bar to half hp in the initial domes. This will put the monster player on the back foot, and may force them to try to not engage at S2. Getting the follow up dome is massive. If you can chip some armour away before doming, that’s amazing. If not, the trapper needs to try to cut out any loops to prevent mitigation.
I can upload some videos of games vs Krakens and Behemoths if that would help? I think it’s mostly about dodging the abilities, good team work, communicating tons and getting that good start. Damage comps are quite effective vs Kraken, but they require you to catch them early. If you don’t, you’re pretty much done for.
Trapper and Support should also damage where possible. Support should be swapping between offense and defence, whilst Trapper switches between CC and damage. WLM is quite effective vs Kraken. The DoTs are nice on the chase.