Nihal
Valar Lord
You may be within one step of your god's alignment to be able to get the boons.
Getting ready to hit to road, so I won't be back online until later.
With respect to the issue of gods - the boon, taboo, and ceremony are only for devout characters. To get, those, you have to live in a way that is consistent with the tenets of the god in question. To worship a chaotic evil god, you'd want to be neutral at least. You'll want to act in a way that is consistent with the god's tenets and at least not outright contradictory to the god's alignment. The ceremony and taboo are important to receiving the boon, so if you don't maintain those you won't get the boon.
Remember, you don't have to follow the ceremony and taboo just because you worship a god. Those things and the boon are for the truly devout among the god's worshippers, so you really want to do your best to embody the ideals of the god to maintain that degree of devotion.
Grandmaster
Mythic Scribe