After the first 6 hours of riding man-made stuff a lot of the base wax was gone from along the edges to ~2 inches inward.
Day 2 after just 2 hours of riding slush I rechecked the base and saw wax was already gone from along the edges to about a quarter inch inward.
While man-made snow is very abrasive, slush is much worse. Bigger ice crystals form in the wet.
I'd try a different wax before I blamed the base. Try a harder cold temp wax for durability.