Actually, I don't even care for general explanation of stacking bonuses. I want to know, can I unequip Exploration 1 once I unlock Exploration 2? Or will I lose the backstab bonus form 1?
*tilts head* backstab bonus?
*proceeds to dig up and launch the game*
Exploration 1-4 for me don't say they have a backstab bonus..rather it's "Increased chance to attack first in a frontal encounter" i.e.
not backtstabbing
That said, you always want the highest ranked Exploration, and the lower ranked ones are not needed anymore
...
That said...
*proceeds to dig through the entiry of the item list*
So...
Reflective Bulwark accesories, as well as Shark Tooth Necklace/Big Shark Tooth/Chainsaw items say you may instawin battles (think that means instawin on making contact with the enemy no matter what orientation)
Transparing/Harisen increase preemptive strike chance like Exploration does
I think that the backstab bonus is either a)stat/level based to instadelete enemies if that's what you're referring to or b)automatic if you're referring to (iirc) always getting a turn before the enemy does (considering how high-level my Amane is difficult to judge, sorry)
As for stacking, if the enegrams have the same tier of skill(i.e. Healing 1 and 2 have Purification 1 both) then they don't stack, it's only different tiers of skill (i.e.e Blessing of Life 1 and 2) that stack/skills with differing names but same effect that stack(i.e. Healing 3 has "Life's bounty" HP boost that stacks with Blessing 1 and 2 HP boosts)