Oh right, I guess Grapeshot is feasible then. Just tedious.
IMHO the clock, number of clicks, and decision fatigue are factors to consider for an event. The more tedious your kill, the more likely you exile the wrong card somewhere (oops Pact isn't open anymore!) or play suboptimally in future rounds. If it's avoidable, I'd rather devote mental energy to interacting with the opponent rather than just going through the sequences for a regular kill.
Yeah I agree with you that
Burning Wish into Tendrils is better than maindeck Tendrils and allows more flexibility to find answers. Both Tendrils and Grapeshot should be in the Wishboard then, along with maybe other tools.