Thosha There is a much easier way to deal with the Temple Mob of eight enemies in the Temple during the Erosian War. Taking on this gang is arguably one of the most difficult fights in the whole game thus far, but there is a relatively simple way to take them all down while minimizing chance.
First your party: Hilstara, Robin, Vhala, Carina. All should be at Max power. Equip Hilstara with Crusader Plate. Equip Robin with Master Staff (the one item you need to purchase. It’s so good that it pays for itself many times over.) Robin has Crusader Pin, everyone else has pins eliminating many status effects.
Now the combat tactics:
First turn, Hilstara casts Holy Shield Wall; Vhala casts Unperson Aura, Robin blasts Erosian Striker with Ice Lance (insta elimination); Carina casts Shield of Purity. Eliminating Striker first means no debuffs from Striker against your attacks, so eliminate her first. She also takes fewer hits than the rest of the Mob and will be gunned down by Robin in one shot IF Robin has a Master Staff.
Second Turn, Hilstara casts Hold the Line or Indomitable Will depending on whether or not any damage hit any other character than Hilstara; Vhala fires Defensive Rain; Robin casts Fire Lance to start taking down Captain (the buffs from her are annoying.), Carina casts Shield of Purity or more likely Mass Heal.
Third turn: Hilstara same as previous turn; Vhala – Defensive Rain again. Robin – Fire Lance on Captain; Carina, as per 2nd turn.
Fourth turn plus: Robin and Vhala finish off Captain. Note that with Unperson Aura the Succubus is irrelevant to the fight and can be finished off at your leisure at the end. Also with Double Defensive Rain, the Reaper cannot hurt you very much. Once you’ve got to the 4th turn, it’s just routine to mop up the rest. Always keep double Defensive Rain active.
The advantage of including Hilstara is that she can soak up huge numbers of attacks with relatively trivial damage during the first two turns. This is particularly the case with Vhala’s doubled Defensive Rains. With such a strong defense, Carina never has to scramble around reviving knocked out characters. She can simply cast Mass Heal or keep Shield of Purity at full strength. And for armour, the Crusader Plate is best because it halves all Elemental magic attacks on her. All attacks from the Temple Mob are all elemental magic. Always keep Holy Shield Wall active. Think of Hilstara as the giant steel pinata that they can attack but never seriously hurt or knock out.