I know for sure Mystic Boon is affected by dual weild. In campaign I'll pull ~200-400 depending on the mob. Sometimes I'll only hit for ~100 and get 1 TP return. So that should be pretty obvious. The fact that I hit for an average of around 200 and then spike up to 400 would lead me to believe that my Brutal Earring kicked in and I'm actually hitting 3-4 times.
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