Boros Tokens Sideboard help

Hello everyone,

I've been enjoying playing the Boros Token Prison deck with [[High Noon]] [[Possibility Storm]] and [[Caretaker's Talent]]. Overall I think the deck has great matchups against the rest of the field, with one notable exception being Azorius Control, which absolutely curb stomps it.

The sideboard I've seen commonly has 2x [[Chandra, Awakened Inferno]] for the grindy matchups, but I have been unimpressed with the card's performance. You often only get off 1 activation before the card is answered, and 1 damage per turn is far too slow.

Any suggestions for alternative bombs to go the distance against control? Thanks!