You didn't understand his answer. Durance's quarterstaff, like other similar weapons, has a long reach (read the item description), which lets him stand, say, just behind Eder and still hit enemies without being as exposed.
I actually did, the problem is he uses some fine robes, and his starting staff, becouse all the good gear went to mine Cipher, Kana, and Eder. Eder is the only melee guys so he is surrounded by enemies all the time, so if Durance is close enough to use his staff he is dead, and he bloody misses all the time.
Thx, this is the answer i was looking for. Ill drop Inspired Flame on him for aim and go with an off-tank build with him, with Arquebus/Shield-sword.
And thanks for all the answers i only used his buffs, and heals, didnt know he his other spells were any usefull