Master Eeko-Dio Daki and the 11th Brother
TBH using the 11th brother and frankly the first Brother in Maul Shadow Lord kind of makes Master Eeko-Dio (and occasionally Maul too) look kind of pathetic.
I know Ahsoka is unique and Anakin trained her harder than any Jedi but Master Eeko-Dio is a Master and possibly 100s or 1000s of years old. Ahsoka walked through the 11th brother and punked him in 3 seconds. Ahsoka also defeated Marrok (1st brother) pretty easily. The fact that Eeko-Dio, Devon, and Maul all struggle with the 1st and 11th brothers, occasionally 2 or 3 on 1 makes them all look kinda weak. Worse they only struggled with Vader slightly more than they struggled with the brothers. If they struggled that much with the brothers then Vader should have merc'd them all before they even saw him.
They should have used different inquisitors.