Sesto has 6 healing potions too. Plus some others...
I believe most of the PCs have a few potions each. We should be fine as long as we don’t fight stupidly!
Mord alas, has no potions. Given all 250 gp worth of those coins to himself he would buy 4 and another 3 sets of robes/masks for his minions and maybe some additional equipment for the 3 he has.