1st edition Psionics converts easily to 4e.
(step 1) ... Pick any 2 Paragon Paths you want
(step 2) ... DM randomly determines order
(step 3) ... PC gets
half of the abilities at 1st level
(step 4) ... the rest roll in at odd levels
(step 5) ... mysterious force in the D&D universe deletes one of these random abilities, any time you face a [psychic] monster or npc
(step 6a) ... when it's all gone, you wonder what the big deal was
(step 6b) ... as an Epic Destiny you recover the deleted powers 1 per level, and randomly
.................. except for level 30,you get to 1/day - 1 shot a deity auto-hit auto-kill (the deity just goes away for a while)
Now that I think about it, that's kinda more balanced than 1e psionics ; dang.