This build is rather easy to play. You start on the backbar buffing yourself before going in.
Do a heavy attack to get your shields up when there is time, otherwise start taunting right away.
When dealing with larger groups, use your Gripping Shards to keep them in place.
I've been experimenting with Dark Convergence but I found the proc intervals are too long at the moment. Pulling all the mobs into place with the leash is usually faster.
When your having trouble with your group heal or are separated for any reason, you might want to try out the crimson cuirass oder the leeching plate armor. These help a lot.