Lots of discussion lately with elemental damage and the way it functions with and without +elemental damage affix, so put this post together to semi-analyze the Spirit Spender Elemental affix types and distribution and a short list of elemental bonus affixes to aim for.
As it stands right now, 10 runes are physical , 6 runes are lightning, 2 cold, and 1 fire 1 holy runes. That isn't very balanced and there has been talk of changing Blazing Fists to Fire and Hands of Lightning to Lightning. A Holy/Fire/Cold DR rune would be nice as well.
The good news is the lone Fire & Holy runes are quite good in terms of damage, while most will consider the Cold runes fairly average, almost all the lightning runes being subpar due to FoT nerfs, and physical runes likely the most popular.
As far as ITEMIZATION goes, Lightning gear for Monks is by far the most common and easily available. A 30% spirit stone, 15% belt, and 15% set bonus puts it far in the lead as far as elemental affix stacking goes. Next comes Fire with the popular Magefist/Cindercoat combination also reducing fire skill cost which along with strong Fire spenders makes Lit/Fire the top two options I think. Holy/Cold are tied for 3rd with 2 extra legendaries, though Holy is in front with two weapons and better spenders/generators. The worst from is Physical affix which only benefits from a Doombringer. Standard slots which all elemental affixes can roll are: Bracer/Amulet/Shield/SoJ/Andariel's @ 20% each = +100% base. For each specific element, here is my current list of legendaries:
Skycutter (sword) (20%)
Utar's Roar (axe) (20%)
Sankis (axe) (20%)
Devastator (mace) (20%)
Eye of the Storm (30%)
Thundergod's Vigor (15%)
Odyn Son (20%)
Raiment of a Thousand Storms (15%)
With a few rune element changes to HoL/BF/DR we could get a much better balance to elemental rune selection, but as it stands right now (3-12-2014) I believe Lightning/Fire/Holy to be all very competitive with the new affix, while Cold lags behind due to runes in both generator and spenders, and Physical mostly due to itemization.