Jabs are really the only way for a magplar to get passive healing while dealing damage, so unless you are super familiar with the add spawns and mechanics I highly recommend running jabs as your spammable.
The first character I ever got Flawless Conquerer was on my magplar and I used exactly the same build as you, except with Iceheart. Just keep up your dots and spam sweeps and you're golden.
Sure thing:
Front bar: Vamp bane/Jabs/Jesus beam/Harness/Inner light---ult: Destro ult
Back bar: Blockade/Shards/Entropy(cuz I'm too cheap to use fancy pots)/Channel Focus/Inner light---ult: Meteor
This was a few patches ago so on live I would prolly swap out backbar Inner Light with Race Against Time for mobility+Minor Force+extra shield.
Another build I used to use for farming VMA was Infallible Aether+Julianos, and with this build you just heavy attack everything to death, like a pet sorc. This build is probably only worth it if you already have VMA lightening staff tho.