I used to do that, but I switched when I realized that saving the hardest for last meant that I didn’t have to do as many clears to get max progression (by doing extra clears on the earlier subs).
Doom (and more importantly, Ultron) get taken out first. I leave the Maggia for last because their sub has some of my favourite dialogue in MPQ. There are a couple of nodes in there that I always take the time to read at least once.
Learned something good here. Hawkguy and Kraven really shines with enemy tiles. If you leave them, Kraven punishes. Match them and gain more blue and purple for them both. That’s synergy. And let lousy dog in with his green and its a fun fest!