Equilab is your friend here. I ran a couple of simulations with different opening ranges:
1-Here I assigned UTG and button the ranges OP used in his post, but these are clearly too narrow based on the descriptions (UTG is LAG, button is aggressive, capable…)
Equity Win Tie
MP2 27.93% 26.85% 1.08% { 88+, ATs+, AQo+ }
MP3 14.04% 13.25% 0.78% { TT-33, A2s+, K2s+, Q2s+, J4s+, T6s+, 96s+, 86s+, 76s, 65s, A2o+, K5o+, Q7o+, J7o+, T7o+, 98o }
CO 14.07% 13.29% 0.78% { JJ-33, A2s+, K2s+, Q2s+, J4s+, T6s+, 96s+, 86s+, 76s, 65s, A2o+, K5o+, Q7o+, J7o+, T7o+, 98o }
BU 26.32% 25.42% 0.90% { 55+, AQs+, AKo }
BB 17.64% 17.03% 0.61% { J9s }
Based purely on hot/cold equity, getting 13.5:2 (assuming no 4! from UTG) then calling BB looks good. If we’re sure UTG is going to 4! (he probably should 4! 100% of his range in a 5-way pot here) then we’re getting 17.5:3, still okay to call but very close. I usually think in a game that has 2 cold callers preflop I can make up for the lost equity associated with being out of position.
2-Here I’ve assigned much wider ranges to UTG and button, consistent with their descriptions. For UTG I used the Deuces Cracked Open Raising Chart in Equilab to assign a range, for the button I choose some pretty aggressive 3! range:
Equity Win Tie
MP2 24.93% 23.68% 1.24% { 55+, A7s+, K9s+, QTs+, J9s+, T9s, 98s, A9o+, KQo }
MP3 16.55% 15.51% 1.04% { TT-33, A2s+, K2s+, Q2s+, J4s+, T6s+, 96s+, 86s+, 76s, 65s, A2o+, K5o+, Q7o+, J7o+, T7o+, 98o }
CO 16.58% 15.53% 1.05% { JJ-33, A2s+, K2s+, Q2s+, J4s+, T6s+, 96s+, 86s+, 76s, 65s, A2o+, K5o+, Q7o+, J7o+, T7o+, 98o }
BU 22.75% 21.61% 1.14% { 33+, A2s+, K9s+, QTs+, A7o+, KTo+, QJo }
BB 19.19% 18.28% 0.90% { J9s }
Here we’re feeling pretty good about making a call even if we’re sure it’s going to be 4! preflop.