Wanda runs Purple/Green/Blue with each of her abilities taking on a different aspect of her chaos magic. Her Purple, Reality Crush, is her heavy hitter that deals damage and stuns opponents facing off against it. This attack deals heavy damage to the entire enemy team then stuns one enemy for a couple of turns. At max level her attack hits harder and stuns longer than MPQ fan favorite Storm (Classic)'s Wind Storm. And since it uses Purple AP to do it, it provides a damage outlet on a color that generally doesnt have one.
The Queen of Chaos Green ability is Hex Bolt, which is a somewhat chaoticof courseutility spell. Her Bolts are relatively cheap at 8 AP and destroy a single basic tile. At that point, it then destroys a number of surrounding tiles that will pop any Attack, Protect, or Strike tiles that it happens to hit. In the process, it will also give the AP from the destroyed tiles, so it can be used not only to get rid of enemy special tiles but also as a tactical AP generator. At max level, it even gains the ability for the surrounding tiles destroyed to include Countdown or other more unique special tiles, letting Scarlet Witch deal with just about anything the enemy can throw at the board.
Lastly, Wandas Blue ability is a boon to both her Reality Crush ability and anyone else that uses Purple AP for their own abilities. Arcane Incantation, a passive ability, creates a random Purple Countdown tile each turn if Wanda doesnt already have one out. After a few turns, it explodes, creating Purple tiles in surrounding squares. The resulting tiles will create easy to make matchesif they dont match themselvescausing cascades and more AP generation. The end result is a somewhat slow and chaotic escalation of Purple AP generation for the team, which can then result in the explosion of a Reality Crush down the line.