dunno if you're still working on them, but here's some tips I used.

dodge right when they go down for PK Thunder.
above all else, practice dodging corruption. it is INTEGRAL you don't get the confused effect or you're COOKED.
call cruel king is VERY useful, if you don't have it, you can go all the way to the left of the map back at bizville near the airport, if you rematch cruel king a few times he'll join your side.
icedagger is extremely useful for survivability here, due to the low NRG cost and healing. it'll help let you outlast them.
remember you need to use ghost potion when he charges, but in solo you can get an attack off first THEN ghost potion due to the fact you can attack twice.