Im extremely interested in this, although both fighters are past it, its an even contest imo. I dont have time to do a write up but my tips for the card are:
Vargas KO @ $6.10: I see this as an even fight and getting Vargas to win by stoppage at $6.10 is way overs imo. Not betting the fighter, betting the odds. Also a small bet on Vargas as a cover for the KO bet.
Gonzalez vs. Johnson U/9.5 @ $1.65: Too sharp Johnson is one of the greatest fighters of this era but is way past it now. Gonzalez will be too strong and young and should stop Johnson sadly.
And for the casual fan, check Joel Julio on the undercard. This guy is all class and a future star imo. GL everyone.