So I wanted to make a force spirit for the Old Republic, and wanted it to be a bit different from your standard force spirit piece. So I came up with this guy

Arca Jeth, Force Spirit. Cost 21

Hp -
Def-
Att-
Dam-

Special abilities

Unique
Speed 4
Jedi Spirit: (Ignores characters and terrain. Cannot open doors. Cannot attack or be damaged, and does not count as a legal target, the nearest enemy, or adjacent. Not subject to commander effects. Does not provide cover. At the start of the skirmish, choose a Unique allied character with a Force rating. That ally gains Master of the Force 2 while within 4 squares of this character. This character is defeated if the chosen ally is defeated. An enemy within 6 squares can spend 1 Force point to defeat this character; save 11. This effect replaces that enemy's attacks.)

Force powers

Force 1
Force renewal 1
Empower allies: Force 2, replaces attacks. Until the start of this character's next turn he gains the following force ability: Allies within 6 squares with half hit points or less remaining get +4 to all rolls and are immune to critical hits.
Master of the force 2

So, what are your thoughts on this character? Any ways to change or improve him? I thought making a force spirit that granted Master of the force 2 would be pretty cool, as well as helping out wounded allies

Yes the ability to reroll that save was the sole intention of him having Motf2. I figured since his point cost is high for a force spirit I wanted him to have a little bit better survivability than just having 1 crack at the save if someone were to try to defeat him