But does that just become a more powerful version of medica 2?
It would make the spell equal potency to medica . Remember succor is 150 potency heal and 150 potency shield . It also costs more mana then medica.

2 succor = 150,150+150,150 = 600 potency
2 medica = 300+300= 600 potency
1 medica 2, 1 medica = 200+500+300= 1000 potency