Using the followed Bow & Tipped Arrow Insta Damage II doesn't deal logic damage that should deal.
Non enchanted Bow:
*Non charged shot;
*With a normal arrow: ❤x1
*With an insta damage arrow lvl2: ❤x6
-Charged shot;
-With a normal arrow: ~❤x6
-With an insta damage arrow lvl2: ~❤x8 (Only +2)
-----------------------------------------------
Enchanted Bow Power 5:
*Non charged shot;
*With a normal arrow: ~❤x2
*With an insta damage arrow lvl2: ❤x7
-Charged shot;
-With a normal arrow: ~❤x9 up to 12
-With an insta damage arrow lvl2: ~❤x9 up to 12 (0 extra damage)

So i was wondering if (the 2 last comparaison) are working has intended.
Because using a Power 5 full charged Bow with a normal arrow or a tipped arrow insta. damage lvl2 doesn't change anything.

*I tested all that on an Iron Golem and with a Health Indicator.