Machinist's Arsenal Job select is one of the many Final Fantasy mechanics that create hero tokens, but there's only one Final Fantasy card that cares about Heroes: Cid, Timeless Artificer
However, upon closer inspection, there is this great line of text, "You may return two Islands you control to their owner's hand rather than pay Gush's mana cost," and this is absolute nonsense
I really hope we get a Quicken effect in the near future to make Ultima truly devastating for your opponent
His three abilities showcase his mastery over artifacts: A zero-loyalty ability untaps target artifacts or creatures and places +1/+1 counters on artifact creatures
Mono-white decks likely have space for it, but there are better things to do with this much mana most of the time, including casting other angels
More than most spikes we see, I think the answer here is a clear yes