While I was Mastering my Unicorn Chomper I consistently undershot or way overshot my target with the Rainbow Warp, and the fact that you need pretty level, open terrain for it to work properly tripped me up uncounted times but eventually you start to be aware of whether or not an upward slope will block the charge forward and I got pretty good at judging the distance for a good 'right-behind-you' Warp or in aiming myself at a terrain feature which would stop you where you anted to be.
Without the Burrow you need a whole new level of precision to get a good Vanquish count.
