Originally Posted by Brisingr
Are special abilities gained during wild shape suppose to use the Charisma modifier when calculating the DC?

According to RPG division, it currently does and he recommends buffing charisma in your druid build because of it. Source

From the perspective of a beginner, this seems really unusual and not very intuitive.

I have 14 charisma on my druid mostly because I wanted him to be my face character and knew there was a 17 intellect helm in Act 1, so I could set int to 9 and str to 8 and have maxed wis, and both high dex and charisma. Doesn't surprise me there's yet one more handicap for wildshapes with a stat most druids won't have.

Tiefling racials also still continue to use charisma checks for their spells despite the ASI update, unlike Dragonborn who were updated to use their attack roll and the damage scales with level unlike the tiefling spells. Conjure flame blade is trash anyways since it unequips your main weapon, and that means the special effects from that item are removed, plus the flame blade scales like crap and upcasting seems to have no effect on it.