Immortal combination: Bishop - Oracle - Guardian - Knight. Raise shield as soon as possible, heal when needed, and instant recharge in emergency plus extra passive attack bonus :)
Nice game, but I think it needs more tutorial. At first, I don't really know what to do... and I didn't even realized that the party is not healed after each battle, so it's terrible at start. But after quite understand the mechanic, everything goes very easy. Just rely on magic spells and everything will be straightforward :) 4/5