I'm with robb on not fully understanding the question. I've probably read it ten times and have been leery about adding my input but I guess I'll give it a shot. I should say that I've been having an issue with implied odds because we're implying that we'll get effective stacks in when we hit, which for me is rarely the case. It's like I need another formula to figure out how often I actually stack off win I hit, like implied implied odds.

As for the mistakes (obv tell me if I'm wrong),

If the pot is $2 and villain bets $1, aren't we calling $1 to win $3? So our pot odds are 3:1.

With the 2&4 (4&2?) wouldn't we calculate the flop using the 4 part? So then we would get 8*4=32, which would be a fold. The problem I have with the 4 part of the rule is it doesn't seem to take into consideration a bet on the turn. So maybe a 2&2 rule makes more sense, idk. Either way we aren't getting pot odds to call here.

Gotta stop here cos my guitar student (that I forgot about) just showed up. I love that I can't remember what day it is but I think I can take on implied odds formulas. Haha, jokes on me!

I'll come back to this later, hopefully someone will have pointed out my errors and set me on the right path.

Oh, and I like what robb said about betting instead of calling. I guess ranges need to come into the thought process also tho. My brain hurts.