[VBCurtis]

You still need to add a LOT more detail to your description or question, because it looks like you just agreed with the people who were trying to show you where you were wrong. If I understand your def'n of ROI properly, the "consistent" decision tree you're trying to build should simply be a list of hands by position (different list for each position) that are positive ROI. Under the assumptions you'd have to make for such a sim, that list produces the most profitable playlist.
Did you try to ask "which is better-- AJo UTG or K9s cutoff?" If so, the replies were saying "who cares.. both are good, play both."
Are you only trying to build a pre-flop list? Give more explanation of what you are trying to say or ask, and you'll get answers you like better.
-Curtis
EDIT: What does "consistant" mean in your post? Consistant what?