Buy Jungle + challenge run + devastator, or wait for a dirge bundle in the shop?

I would assume you are still earlier on in your ABT journey and I will assume you do not have any Combiners unlocked yet as well.  While the weekly chests you receive from the challenge runs will help you out a bit I think that Dirge will help you out a lot more with the daily Spark Runs.  He was instrumental in me getting how far I have gotten in the game so far as he is still my go to guy for completing spark runs.