Why are we exactly buffing Tahm Kench?
Maybe people haven't realized yet, but Tahm is an extremey strong top laner with very little weaknesses one can exploit as he can build full tank and deal an insane ammount of damage aswell as having some map pressure due to his Abyssal Voyage.
The mark lasts forever and it's really annoying because getting eaten by Tahm is nearly always a dead sentence.
You'll see what I mean soon enough.