Jan's post-boot powers seem a little vague - but, the organics question aside, I'll put my money on Condo. Chemical King controls chemical reactions - so it's possible that any chemical structure that Jan changes, Condo will start a reaction to destroy it. It may all come down to speed - can the reaction progress quickly enough?
The other thing against Jan is his alleged mental instability. Even pre-Progenitor, Element Lad was a little woo-woo. I mean, he could be in full battle with Chemical King, and stop to smell the roses. Or write a poem. I don't know.