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Option #1, its nonsensical to make a counter to x which is itself countered by x. Options #2 if it's a blanket cbn.
Regarding Unity -- your opponent giving you a Canaanite wouldn't turn it off because Unity will be your characters meaning "own and control." Holy Grail will be able to turn off some Unity abilities, but not all of them. (If the Unity is "Hero (O.T.)" and they convert your O.T. EC to a Hero, you're still fine for example).
I think saying Gath is great for either option as long as it is an auto include in a Philly defense.
FTR Holy Grail does nothing to stop option 2 from protecting Philistines. That’s one of the reasons we believe it’s more than adequate.
Voting option 1 with cbn lol seems futile at this point as clearly cbn protection himself and others will not become an option