A lot of these things are already implemented in the Eldrazi Domain cube, so maybe that's a point of reference?
GRRR IS THERE ANY CUBE PROBLEM YOU HAVEN'T SOLVED ALREADY LEAVE SOME FOR THE REST OF US
But in all honesty.. I'd forgotten you'd done something similar with the Eldrazi Spawn theme in your secondary cube. I'll go take a peek.
If you're putting
Imperious Perfect, check how many elves you have and see if
Elvish Archdruid can make the cut.
I'm looking at your list and i see
Bitterblossom and
Zealous Persecution, which were 2 big parts of the lrw-10th-ala standard bw tokens deck (neat). It isn't a green card, but
Windbrisk Heights was a big part of what made that token deck tick.
Jade Mage has been okay in my list, one player picks it very highly and loves the card. He hasn't won yet though.
Empty the Warrens is the one storm card I'm fine with running without support for a dedicated storm archetype because just hitting 4 or 6 tokens makes it worth it (at least in my cube) and it isn't hard, and sometimes you can get a lot more than that.
Some great ideas! Along with the Archdruid, I was wondering if
Ezuri could cut the mustard. I like the built-in
Overrun effect he provides. My main issue with elves as a tribe is that they're pretty much solely restricted to green, so that puts a hard boundary on the amount of creativity a drafter would need to put the deck together.
Windbrisk Heights is an awesome suggestion, and it's actually in my utility list already (as is
Khalni Garden). One land that might get incidentally better with more token support is
Kher Keep. Okay, maybe it's a stretch, but there have been worse ideas.
I don't like
Jade Mage very much, because costing three mana to activate is a big hindrance to your board development. I'm hoping that more expensive creatures that continually produce cheap or free tokens - hello,
Creakwood Liege! - fit the bill better.
Empty the Warrens is a good call, even when storm isn't officially supported. I'm already running
Gut Shot and
Gitaxian Probe, so four tokens seems trivial, and six bodies isn't an unreasonable goal. I'll stash this one on the back burner.