Im a chair in the middle corner of the room

Holy moly.............. can ANYBODY tell me how this support gem works?

Sacrificial Lamb
Support
Minion

Supports skills which create Minions, causing your skills which can target Minions to prioritise targeting Minions from the Supported Skill.

Your Skills target Minions from Supported Skills within 6 metres if possible.

If you use any skill that would need to sacrifice your minions, like offerings for example, the minions that have this support would have priority on the chopping block.
Works as intended....most of the time. It's a gamble really.....