Warp Storm Table Odds

I figured I'd take a look at the potential for each result on the Warpstorm table to occur.  The percentage chance of a result occuring at least once doesn't change with more rounds.  I started down that path initially but had to remind myself of come basic college math.  Now, the odds of a result occuring a specific number of times (greater than once) during a game of varying length does change.  I'll leave that for another day.

2.78% - All units take a Daemonic Instability test
5.56% - One daemon Character tests on Leadership with 3D6 and takes wounds like Daemonic Instability
8.33% - All daemons -1 invulnerable save
11.11% - Roll D6 for all enemies and nurgle units, on a 6 hit by a 5" template S4, AP5 barrage
13.89% - Roll D6 for all enemies and tzeentch units, on 6 D6 hits with S4 Ap3, poison, ignore cover
16.67% - Nothing
13.89% - Roll d6 for all enemies and khorne units, on 6 D6 hits with S6, Ap-, ignore cover, rending
11.11% - Roll d6 for all enemies and slaanesh units on 6 hit by a 3" template S8, ap3
8.33% - +1 invulnerable save for daemons
5.56% - one enemy psyker test on Leadership with 3D6, if failed he explodes and you get a new herald in his place (Perils of Warp, we are here!!!)
2.78% - a new troop unit of your choice (bloodletter, plaguebearer, horror, daemonette) is summoned, 2D6+3 models

So in any game, the odds of getting a 2 or 12 at least once is less than 3% each.  While this will happen, it will be rare.

Now, assuming that your enemy has at least 6 units on the board (on average throughout a game - for giggles) you'll have an 8.33% chance that an enemy unit will take a hit at least once during a game.  Granted it will be a random unit and a random hit type from the 4 types above, but that's still something.