Star Ocean 3.
Fayt solo, mandatory battles only, Galaxy+Gutsy Bunny, no HP/MP skill levels, no item creation, no clone generators
fun, no grinding and challenging
also for P4, there aren't many cheap deaths - if you are about to get killed by a single target attack, your party members block the attack for you(and they always survive it)
there is no "required" persona
it's just way too easy to reach the bosses at a much lower level, so just train and freely fuse stuff. it's not rocket science, just use common sense(when you have stuff like Wind Boost and Resist Elec, obviously try to pass them onto a wind elemental persona)