Formula help/combo feeding

My 10 week old is EBF. He’ll take a bottle occasionally if I’m not around but I don’t pump close to enough to even establish more than a bottle every other day. I’ve been looking into combo feeding with maybe adding a bottle of formula before bed or just throughout the night when he wakes up (usually 3-4 times). My problem is I’m strictly dairy free bc I think it bothers him. My daughter had a milk allergy so she was on elecare for a while then nutramigen. Should I just go that route again and use nutramigen first? Or I really want to try that Bobbie formula that’s clean ingredients, but it contains milk. Anyone try that? Also does anyone combo feed? Any advice? Thanks