Phantasy Star IV (Genesis) - Boss 09
Gens v2.12 Movie 11
Chaz - level 24
Rika - level 25
Rune - level 24
Wren - level 23
Raja - level 26
Use Barrier/Saner/Blessing at the beginning and carefully heal when necessary to have an easy fight. Dark Force is weak to Chaz' pure energy attacks (Tsu and Githu at this point of game), so use Githu a lot. He's also weak to holy attacks such as Saint's Fire, but you should have only a few of them (Rune need level 29 to learn Efess).
Thanks to Raja's Ataraxia you should not run out of TPs.