Don't be too sour on him: with the buffs he'll get and his healer ring, he will be a very valuable asset for auto-battling your way through. Give him ardent sacrifice and he'll make a useful battling mage!
Even people with 40% units should run him for this TT.
I just did a YOLO pull on the new banner and got 5* Elidgan so I guess I'll be running him with my Horse Emblem.