I am actually considering trying to get this into the next patch (and remove Unequippable). But it'd be RNG 2 or less.
It's a standardisation thing. Lots of abilities work with range 2 or less, whereas i don't think any others trigger from 3 or less. It used to be that the main distinction was between melee (range 1) and range (which was anything else) but it was changed, i think because there was too much ambiguity (code wise or design wise, I'm not sure exactly) and because it didn't seem right to penalise lots of 1-2 champs for not being melee.
Well then i'd rather have grimlic with unequipable and being able to put firelight on nefari fireslinger than grimlic without equipable but not being able to put firelight on fireslinger. so i'd prefer not change the firelight gem
i mean, if grimlic losses unequippable, he is just going to be equipped with bloodstain claws and get that equipment nerfed.