How to fix Xin and make the changes work as intended

The AD buff to his healing was a WRONG direction to go, his build path already has AD in it, if it did something was to make this build ( ) A LOT STRONGER, also adding extra heal for an interaction with Warlords Bloodlust due to the crit added.

I have no problem with the crit on the third hit because the damage is almost the same as it was oriented towards him building crit, the problem is that he doesn't need crit because nothing in him scales with crit.

The solution to the current problems lay in reducing his ap scalings on his healing (to disencourage that profane AP-Devourer build), taking out the AD scaling on his healing and allow it to scale with critical, in this way he will get rewarded for building critical and he wont be that monster of sustained damage, AS and healing he is.

Also please stop him from healing out of turrets...