To be honest if you're going to play basics, just pick regular basics. The deck does not need actual colorless mana and using either swamps (for skirge) or other basics like plains at least provide some extra angle for sideboard cards. Like for example this list that recently made top 8 in Belgium: https://www.mtgtop8.com/event?e=20675&d=336231&f=LE
Does this list pretty much fold to Chalice on 2? I am debating running this list next weekend at a local Chicago Legacy tourney. Seems to be very good for the meta I’m expecting.