The issue i have with the build is this: How much healing do you really need?
5/5 in Sweet Release, Elated and Life Tap plus 4/5 in Sustenance PLUS the healing you get from 11/5 in Kinetic Reflection. With this much healing, you could almost take the place as the new test dummy at Marcus’ place.
Seriously, though… That is a lot of healing, and it’s a lot more than you actually need. For any mobbing situation, but especially when running a Mirrored Trickster build. Here’s how I would build for Fink’s.
2/5 in Life Tap is usually more than enough, considering how much damage you deal in the OP levels. Same goes for Restoration. Sustenance is a nice enough skill, and when you play solo, you just move the points from Res and Restoration.
Even though you have KR, you still need to worry about DoT’s. The Antagonist is a great shield. It’s fast and has good capacity. But no shield is so good that it doesn’t need 5/5 in Ward. Inertia will also help you to push through those nasty DoT’s that you, no doubt, will catch from time to time. For general mobbing, you could move those three points to Suspension.
Wreck is a really good skill, and one of Maya’s main dps skills. 5/5 is recommended at all times, except when facing certain raids.
This is a pretty standard build for Maya, and it’s one that’s been proven to work really well. When you don’t run a KR-Trickster, you simply switch to 5/5 Suspension, and you’re good to go.
As a final note… As the OP question was “Butcher vs Heartbreaker”, this setup does not require Moxxi weapons at all.