Here is My build that absolutely stuffs Royal engineer Spam... it doesnt seem broken at all anymore :D

To people who may skip looking in to build order.... it is a standard 2x sapper opening + 2x sections with early cache and air and see. Engi spam is 4x sapper + tc with armored + whatver you feels like, but often just sections or more sappers and CAA. Here was just a grant rush trolling.