A basic Mardu control brew I'm working on. The premise is to use cheap/efficient early removal to last into the late game, where gearhulks and eldrazi can take over.

I know cuts need to be made, propbably in the creature and/or walker groups, but not sure where. Any help would be appreciated

EDIT: Thanks to some helpful suggestions from Reddit, I have made some modifications which I believe will help greatly. Still taking suggestions from anyone who has any additional insight.