Alternately, if your deck plays discard or countermagic, just wait the extra 1-2 turns to play your important threat with mana up for a same turn TS or Spell Pierce
Canoptek Tomb SentinelCanoptek Tomb Sentinel can get in some decent damage, but thanks to vigilance and it's ability to exile a permanent if it enters from graveyard, it makes for a decent deterrent for attacks
We can only afford 3 Game Changers anyway, and the choice of 1 mana tutors or moxen is taken away, leading to our inclusion of Deflecting Swat, Demonic Tutor, & Jeska's Will as more obvious than they'd otherwise be
Specifically, unless Space Beleren's first loyalty ability has been activated, sector assignments have no effect on combat
Taking full value out of your spells is the best you can do in Modern at the moment