Phantasy 2018 series v156 FULL install with all patches through B8b: contains important fixes to resurrection and tournaments.
Phantasy 2018 latest full install, series v156 (classic troop trees) with critical fixes. Notably this version has starting as king day 0 compared to v150 series, a different character generator (and yes it is dark), auto resurrection (which works but you need many high level clerics in your party to feel a difference), and more. If you don't already know how to play the mod probably v150 is easier for your first character, and otherwise this version is technically superior (more lists allowing more capabilities internally, more items, moved around map, more things to craft, some new gear).
if you previously had characters started with v156, consider this a hot fix and keep using those characters. If you already have characters started in series v150, those characters can't run in v156. You would make a fresh start in that case.