The biggest problem that I can see is that the AI is stupid and Xeno's simulator only really works for rushes. So basically, this becomes a game of "Who can build the best grabbow"?
Also, an Elements PvP without the Element's PvP is basically just, well.. Nothing. It'd just be Risk with a weird rule set.
So here's my idea for an improvement, though it'd be a much, much slower event, and thus shouldn't be taken seriously. It'd work well as an entirely for fun un-official event.
TO posts the game map (possibly the following, but preferably larger and with a blank background?)...
And all players involved (up to 5, perhaps more if we wish to have teams) take turns claiming territories and placing the initial troops, as per standard RISK gameplay. RNG is used to determine turn order, and play begins. If so desired, particularly for time constraints, RNG could be used to randomize territories and initial troop placement as well. Gameplay, again, continues to follow standard procedure.
The twist: The amount of troops you have on a territory determines the amount of up's and rares you are allowed to use in your deck for that battle. An upgraded card is worth 1, and the value of a rare depends on the number of "bands" it has, +1 cost per band .
For example, if I have 5 troops on Irkutsk, I could build a deck with any of the following
1. 5 upped common cards
2. 1 upped nymph (3 band) and 1 upped common
3. 1 upped shard (2 band), 2 upped common
And so on. Note how upping a rare card adds to the cost.
Winning a duel = winning a die roll. The loser has 2 troops on that territory killed. Repeat as necessary. (Note that should the loser wish to continue the battle with that same deck, they'll have to remember to remove 2 "points" worth of rares or up's due to them "dying".) The first criticism I can see here is that, unlike RISK, Elements RISK played in this fashion would have no potential for ties / moar dies for the attacking player, therefore the balance is different: Defenders no longer have their slight advantage. Which may be a bad thing.
As I said, much slower. But I think there's potential here. With a bit of tweaking and patience, I could see this becoming a fun event. Thoughts?