Phase 1 Skeith- Out of all the Phases this one is the hardest because you`re at a low level so make sure you have lots SP restoring,reviving and status healing items. He`ll use this attack called Judgement you can`t dodge it and it will take a chunk of your health. He`ll also use Data Drain and that causes all the bad status changes . Anyways hit him a lot then data drain him after it says data drain ok then everything should be a walk in the park.

He was the hardest? Pssht. I never did play Part 3 because of the lack of Elk and Mia, but Skeith was easy. :<