only 15 seconds is availabe to cranes it gives minor time to prep for turtle, but not too much time to give turtle no chance of recovery. This doesnt nerf turtles or buff turtles in a way that will make them too good against classes that they have advantages against already
then how charge suficient rp in 15 seconds vs other characters?
only if the cranes have book like turtles.
or buff with rp regeneration.