I never thought I would consider this but I have way too many tabards (14) and I just recently pulled a ^4* purple mana bonus troop
No luck with pulling purple 5* except for Quintus.
If I get the mana bonus to as high as possible, Quintus will go to average speed ie 12 tiles - 12*17%= ~10 tiles
If that’s so he could be viable. Hmmm.
Am I dreaming or what
^Edit. Thanks @Shohoku79