Coming back to my MM
Greatsword will work fine, but if you went form blood magic then you’ll probably get more out of the dagger’s quick hits for your life drains. For stats I would match your other gear. For runes I would pick Force for a teeny damage boost and probably Water if you really want the heal out of auto attacking.
For a build designed to support your minions and keep them and yourself alive with healing, Cleric’s is probably your optimal setup for power builds. If you wanted to run pure condition weapons then you could run Apothecary instead.
Monk’s Runes are probably the strongest healing runes available these days. If you want to heal more then sure I guess.
Sounds like you found a build you really enjoy. Congrats! For now I’m just incorporating Rise! into my shouting blight Reaper for the damage reduction while I act like a walking berserk button.