Axiom arcanist malzahar?

Now that axiom arcanist is live, I was thinking what if we got axiom arcanist instead of manaflow band. Could it work? I mean I've been thinking that we might have huge mana problems(because malzahars E is kinda costly) but 14% more ult dmg and having your ult cd reduced by every takedown is kinda huge for a champ with that iconic ultimate.