I tried to run some numbers on the proposed Wizard and Barbarian legendary necklaces.
Wizard DPS w/ new necklace:
*9* native ST = 135 damage (net 108)
+4 free action spells, 1 at each level
+1 Dart as FA = 21 (net 21 + modifier)
+1 Jinn's 12dmg scroll as FA = 27 (net 27 + mod)
+1 Ray/Ray = 18 if slide is made (net 18 +mod)
+1 Lightning Storm = 20 (net 20+ mod)
108 + 21 + 27 + 18 + 20 = 194 without spell modifiers
If mod=35, then we have
108 + 21 + 27 + 18 + 20 + (4 x mod) = 334 damage
Compare to barbarian legendary - +10 dmg
Over the course of 9 rounds, the necklace will net 90 damage.
Additional Rage - 6 damage x 3 rounds of combat = 18
Assume Fury allows two crits that would not have otherwise happened - 13 av. damage wheel +63 damage modifier = 76 extra damage per fury
Total for 2 Fury = 152
Total net for barbarian necklace ~~ 260
This seems reasonable, Wizards do have some ground to make up. As it stands, that's a gap of 74 damage between the Barbarian and Wizard legendary necklaces.
The combination of Free Action spells and MEC is concerning, but I don't think it's broken as of today. Using the two in conjunction and paying 20 life kind of functions as an 'auto-crit'. It's reliable high damage output, but it does come with a hefty drawback. It reinforces the whole Glass Cannon concept which is cool.
If the Wizard is able to constantly pay 20 and 'auto-crit', that might be pretty lame, though. EDIT: can't MEC 2x in a round.
One last observation - based on the fact that Barbarians can miss, I think Wizards can (with a little work) out DPS them now. 4 free actions are built into the Legendary, and there are a few other ways to eke out a few more (RoSS comes to mind). Between those, MEC, and Charm of Spell Swapping, Wizards should be able to reliably push out **77+** damage every turn. It gets complicated after the free actions dry up, but that's when a Wizard can fall back on MEC'ing her spells.
* - I only factored 9 skill checks because one was left open to be utilized as a free-action spell.
** - note the barbarian +63 damage modifier sacrificed TEs. Wizard build was able to get to +35 spell dmg without sacrificing any TEs (only used 15 tokens, no head token i.e. no Crown of Focus equipped).
"IMHO we like to solve problems here on the forums that are only perceived problems due to a myopic view." -Bob C