And Elite Four, also the Fortress Leader, imposes a mutual conditional that, it seems to me, is designed to accentuate some broad characteristic of a type: statuses for Grass, alpha strike for Electric, retreat cost for Water, and so on
The crew 1 does let you play more of the clunky vehicles, and therefore have a deeper well to pull from, however, so with that in mind I think I would give the overall nod to Astor if you're looking at Boros vehicles
Claws of Gix by Henry G
a few potential targets to drop into play include the on-color titans, Combustible Gearhulk, and creatures that benefit from combat like Professional Face-Breaker
I also like this in reanimation brews
Rare Candy is essential here, letting you skip Combusken entirely when you need Mega Blaziken ex online fast