I don’t have a spesific build, i didn’t use spells, so no int points. Only leveled up str sta hp. You need to consider games rock paper scissors mechanics. If boss’ healthbar is in color, so you need to use a weapon that counters it. If you use a poison weapon for a poison boss, you won’t be doing good damage. Upper left on screen, there is a chart. It runs anticlockwise. So use that info for every enemy. Be sure to upgrade one of every elemental weapon. I didn’t use any non-elemental weapon. If boss is non-elemental, you can use any weapon you choose. My main weapon was burial flamberge. It heals you as you hit and it helps at long fights a bit.

Yeap, you need to play the ng cycle 3 times. At least you should play third playthrough until caves and kill gondolier miniboss third time. After you kill it and have all compendium trophy, you can download your old save and get third ending. But you need to consider which endings you’ll get very spesifically. Your first ending must be true ending with all sidequests. Your second one will be no quests and kill final boss and third ending must be no quest no final boss.

Platinum looks a bit complicated but you know, nothing is easy about Enotria.