Yeah, so if glitching or crit-glitching matters a lot, it's definitely a no. GM also has the final say. For example, there's someone who asked 'hey, if I have 19 drain dice, can't I just buy hits and cast any 4-drain spell risk-free?' on Facebook, where I said 'nope, there's 2:25 chance you take drain still, so I'd keep that in'.