Alch Summon hart banner

So I used to have the hart fabricator and he was pretty good for a lot of stages but I didn't want to summon for him again with gems since I wanted the new units and I had gotten this guy on the alch summons, is he good?

So I used to have the hart fabricator and he was pretty good for a lot of stages but I didn't want to summon for him again with gems since I wanted the new units and I had gotten this guy on the alch summons, is he good?