That allready should give you and indication of how good the head of focused energy really is.. futhermore for me at haste got the stat weight of 1.98 while crit has 2.15, so even if you do a direct comparison of just the haste and the crit.. the difference aint as big as you might think. Plus it has 134 more hit, it has 55 more int, and futhermore if you gem it with a piercing wild jade it has an extra 160 hit and crit.