Lol.
Both champs are terrible choices for the set. It's also literally one of the least-used sets in the game. I have exactly two champs using it, and both were doing so for the same reason - a Bommal team. A set which has literally one use in the entire game absolutely warrants reworking.
I don't know if the changes will make it any more usable, but I can think of one team that definitely would benefit - Rotos + Siphi, where Rotos using the set gets to benefit from big TM boosting while also basically not caring about the debuffs due to the duo passive.
I could see Tuhanarak working pretty decently in this set too, for any arena team using her.