Am i way off here (-ev?)

[Machmood]

Im sure its -EV as im not the first guy to bet sports and try to find an easy bet. This being said i know parlays r -ev, but hear me out. If you parlay a team that is a hudge favorite, lets say -400 or higher on money line, and take a team you feel is gettting a good line between -.05 and -2.5(less then 3) would it make sense to parlay these 2 teams. My theory being you take a hudge favorite and parlay it with a team that u feel is at worst 50/50 with the points and u get that 50 50 team getting odds . let me just show u and it may make more sense
Buffalo -2.5
NO saints -550

This parlay is +126, that seems pretty good to me concidering u can almost chalk up a saints win, and get +126 on the bills -2.5??