None of the other items have been nearly as much of a problem in other lanes and you curved it for the most part.

But you will forever see spellthiefs edge line be abused in other lanes because its too fucking good.

22gp/10 is absurd for 850g. 850 gold could pay for only that stat alone as an item, and STILL be absurdly good.

Frostfang is the only support item to have 111% cost efficiency, which is some of the best in the game, on a starting item, that you keep, which gives a massive amount of gp/10.

If you want it to stop being abused, it needs to be on the level of the other ones. And by that i mean make its cost efficiency around 60% and its gold income about 12/gp10 because thats what both nomads medallion and targons brace are about for you.