Tellarknight isn't supposed to be a combo deck, you are meant to grind out value with your monsters and win the advantage war, then use your mats for Delteros to push for damage. Through the use of cards like Ballista Squad, Powerful Rebirth and Enemy Controller, the deck can keep 3 bodies on field per turn, and the moment you can get Delteros on field and revive with Altair, you basically win
waiting turns to do something, hiding behind backrow to survive, hyped.....this gives flashback of another deck that was supposed to be tier 0 and break the game, I'd remember the name if that deck actually saw play.
They can't Karma cut you on the Delteros summon, which gives you the priority to activate your pop effect, and then use any of their chainables like Ballista Squad or Enemy Controller to make the Delteros float. Besides, if you had Karma Cut previously on field, why the hell wouldn't you simply use it against Deneb/Altair, which are arguably far more important targets?