so I noticed that the group hp siphon for a ward and bloodletter both don't work when it's just you and a merc. I just feel that it should I mean the merc is a part of your "group"
Yes. It should. These abilities have always relied on 3 total. Though bloodsiphon still does something with solo or 2 people, it's just laughable low (~ 1 - 2k ward).