I'm not sure if you accidentally read Ozo's Passive wrong, but health regen from things like boots and warhorns isnt increased. Health regeneration is not increased. Only everything else. BTW might wanna throw in an extra halcyon potion or two for early-mid game. Also might I suggest getting Warhorn AND contraption. I use it for Ardan, and I get the 2.5 Splash damage (Which can help a LOT with Three Ring Circus, as they count as basic attacks AND basic attack reset, allowing 6x damage from...

I am honestly confused at the 1v5 part. 3 is the max on a team in Vainglory. I play league too, and its a LOT more complex, so you may have mixed your MOBAs up a little. Also SAW is a large threat, but in my opinion, Ringo and SAW should switch places, as you can easily and safely farm from the cover of your turret when fighting SAW, but Ringo can heel shot you now and then and some Ringo's like to use the same Turret-Cover tactic, which can put you in an awkward position for ganks.