Ok I went to do a bit of research.
I play mostly 50NL cake where we dont have stats on players but with the help of HM we do have some stats for ALL players.
Looking at the stats for ALL player on Cake NL50 I see the following:
ToTal PFR: 9.1%
PFR UTG 7%
PFR BTN (steal): 23.9% BUT
PFR BTN (after limpers): 11%
FOLD to 3 BET: 50-55% (depending on position)
So I came up with the following(assuming a 4bb open raise and 1 caller):
1) Dont squeeze (bluff) the UTG raiser.
2) Squeeze (bluff) MP raiser + with the following range:
22+, A2s+, suited broadway.
math:
EV = Pot*Foldequity + (1-Foldequity)[(eff.Stack+Deadmoney)*Equity – ((eff.Stack-Blind)*(1-Equity))]
pot = 4+4+0.5+1
Foldequity= 50% (worse case)
eff stack= 20BB
dead money=5.5 (4+0.5+1)
Equity=38% (I took the calling range of 4.68% which is TT+ and AQ+ which is about 50-55% of the PFR range)
EV=9.5*50% + (50%*25.5)*38%-19*62%)
= 6.22
Rake 1.35BB so NETT PROFIT 4.87BB
Against the 3BB raiser we can only 3bet for value.
Against the 3.5BB raiser I will consider my stack size.
PLZ COMMENT IF YOU AGREE / DISAGRE
tl/dr: Playing against an unknown player a good starting point for a Squeeze range is 22+, A2s+ and any suited broadway.