Level up to 4 early if you want to start a win streak. Level up to 5 to try and continue the streak.
If you're weak in the early game, you can opt to save gold and lose streak instead.
At Round 2, level up to 6 regardless of your start. Put together the strongest team you can.
At Round 1, level up to 7. Roll down to stabilize your comp if you are weak. Afterward, save up to hit level 8 and complete your comp.
This comp is a solid idea if you are planning to build a Karma or Vel'Koz comp but find the other carry first. You could always transition into the comp that uses one of these carrys, but you can opt to run both if you have the items for both.