redoing my rate. :(
solrock / tropius / choice specs camerupt / choice scarf samurott / muk / kangaskhan
yeah, so it looks like swift swim water-types are a bit of a bitch to deal with for your team. muk could take one hit, but that's pretty much all you got as your "line of defense." musharna is also problematic, because it fears nothing aside from your camerupt, and can proceed to set up from there.
water-types such as gorebyss and carracosta can rip through your team at +2, so running
choice scarf rotom-s over tropius will help you check such pokemon while being able to maintain a fighting-type resistance. it also has trick to dissuade musharna from setting up so easily.
since rotom-s is the scarf user of choice, samurott can just use its
standard special set. the last slot can be dedicated to either
taunt or
megahorn. the former helps a bit against musharna and stealth rock users while the latter is if you want to nail ludicolo trying to switch in for free.
lastly, muk feels a bit out of place because it doesn't offer too much aside from haze. even though haze is generally a useful move, muk doesn't make good use of it when setup sweepers already hit it hard or when muk can already hit such sweepers hard right off the bat. therefore, i think
life orb gardevoir would be interesting here for a number of reasons. it offers something that can revenge kill swift swim and chlorophyll pokemon that plague a majority of your team. it also has destiny bond to remove troublesome pokemon as a last resort.
of course, i also agree with flcl's minor change.
fake out on kangaskhan is extremely helpful since your team is still a little slow against some of the fastest threats in NU.
summary:
solrock / choice scarf rotom-s tropius / choice specs camerupt / life orb choice scarf samurott / life orb gardevoir muk / fake out substitute kangaskhan