Ashaya will usually be a big creature, so cards that scale based on power and toughness are excellent
However, since it's an FF-limited build, I think it's fine
You might just find your new favourite card shop
A creature with Protection from a quality, let's say a colour for simplicity, can't be targeted by spells and abilities of that colour (like Shroud, that's regardless of who controls them)
Another possible combo is with Capsize, following the same Buyback logic as Searing Touch, but this costs 1 generic and 2 Blue with Buyback 3, so it can only return a handful of permanents to their owners' hands
Also the perfect answer for Diablo Devoted Herald but a set late