How I would balance Akali
Passive --> Akali now heals for half the amount of old Q heal when she crosses the ring. Attacking a turret while passive is up consumes it. TL;DR- A combined Twin Disciplines. Q --> Base damage +5 W --> Makes enemies nearsighted(like the Graves thing) E --> unchanged, same as live. R --> 1st dash: No longer a dash. Akali now throws out a kunai that damages(only a little damage) and marks enemies. 2nd dash: Stuns for 0.5 seconds on hit. If marked enemy dies, refund 50% of all non-ultimate CD. Marked enemy is stunned for an extra 0.5 seconds if they don't die. Otherwise unchanged.
This seems pretty broken at a glance, but it combines new Akali with elements of old Akali, which was less of a problem compared to new Akali.