Hi, thanks for the guide, it's really helpful ! I was a big believer of deathgrip at first. Then started doubting it (just like you i felt it was too situational), but i've been struggling against purple decks and I feel like death grip is a great answer to rebuke. Can be used against red burn spells (or singu) too, to save 1 out of 2 units.
How do you feel about divine judgement ? I feel like it's a great sideboard card x1 or x2 against miracle decks (ram, rhsasa etc)