Buying champions at random is a terrible strategy. It drains your gold so that you don't gain income, and you are likely to skip over stuff you thought you didn't need and then find them later on, or miss out on stuff because you can't afford it.
A better strategy is to go into the early rounds with a plan, pick units that you need for that strategy, and if you haven't been getting the champs you need by the time you finish krugs, start doing refreshes and buying any 1-cost champions. This pretty much guarantees having 1-2 Silvers going into the next round if not more, and what you get can indicate which way you should go with your strategy, whether that's to continue on the path you're on or completely shift in a different direction.
Edit #1: As for what you have on the board right now, I'd love that start. I would dump the Kassadins, Shens, Blitzcrank, and Warwick, and re-roll for rangers, nobles, glacials after the Krug round.
Edit #2: Also your positioning there is god-awful. Your units should be positioned on the right side to kill off the first Krug before the other two arrive, which increases your chances of killing multiple Krugs. As you're set up now you probably kill at most 1 Krug.