Been trying to improve my game recently by creating more optimal ranges that altering it with player pool tendencies in game. This is my 3B range vs UTG.

Two questions:
1) Is a 1.5 bluff to value ratio for a 5B correct? (Not sure how this is calculated because of the equity we have when called with our bluffs)
2) I'm currently 3 combos short. My options are to 5B AKs (not ideal vs 4B/call range) or flat AK/QQ, but feel this range is way too defined and villains can play very well vs me (e.g. KQx boards).

Side note: If anyone can link we to a video/post about how our 3B range changes depending on our position (as the chance of getting getting CC or C4bet decreases), it would be greatly appreciated.