Hi for green titan, there is illmarinen who def debuf -56% for 4 turns
(And in practice Kornel will always start from -48% since he activate his passive attack 100% of the time 
he also can attack buff on 1st mana charge)
Skrekok is only 3 turns
Kiril C2 does not have attack buffer ( he has enemy attack debuff) – except his individual superior talent)
On dark titans, maybe we consider Mist as special attack buff?
Thanks again for the great graphic!