Parse a dummy for 10-15+ mins. If you make a few mistakes, that's ok, but try to keep your rotation ideal. Your dps will average out. You will minimize outlier lucky proc/crit streaks or unlucky no-proc/crit streaks. This is sustainable dps in a vaccuum. Battles add mechanics and down times that will tend to reduce your dps further, unless you can abuse damage vulnerability phases, aoe or multi dot on multiple targets, or buffs from party members you can't get by yourself on a dummy..