Yea its true, but the thing is, as a champ you do less damage with a solo Fallenbishop card, its not like the card give you extra damage
Adding the Tanne to the shoes let you have the effect of 1 fallenbishop in your shoes, disatvantage form that: it takes 2 slot shoes and drains 40% HP, i think its to much downside on that one.
Reducing tanee hp nerf to like -20% or like how its done with other classes by boosted valk weapon to give Dorcus a HP boost will balance it mor