I do it a lot to be honest. when the redeemer first came out I proxied one and made a generic tournament army list with it vs. my tournament army list with a crusader to see which variant did better. it's a lot more effective than math hammering as that doesn't take into account range, cover, other units on the board etc. etc. if it makes me a "saddo" to practise my game before a big game then I'm sad. So is everyone who trains for sports by running or working out alone. same Principle....