Re: Super "Chi" powers?
There's already a wide range of ideas here so I'll float some build concepts for the Chi Master.
Stretching with invisible power effects and gestures to represent the martial artists ability to strike at range with just his Chi. This is a variation on the normal energy blast since the character is actually projecting themselves at the target.
The Technique multi-power this is a multi-power for Naked Advantages that can be applied to strength. Examples include the Spear Hand (Armor Piercing) , Vibrating Palm (Penetrating), Atemi Strike (AVLD versus Hardened Armor), Combos (Auto-Fire), Lingering Strike (Continuous possibly with Reduced End) and Death Touch (A killing attack equal to strength with NND: Requires nervous system and does body). The Death Touch would likely be the most expressive power in the framework, likely twice that of any other, allow the character to combined two of the other strikes when attacking or use the extremely deadly attack.
Hope these ideas help.