One CD Size that equal to one Large Blast Template. CD works the best since some units need the template for fire at enemy units.
So when all the amount of twister on center. After both are ready to fight the begin of each player turn must roll 2D6 and one Scatter dices and move disk or template what direction the scatter dice point to. Then after moving twister then they roll 1D6 and scatter to detriment Wind direction. The D6 is roll for how powerful is the wind so if player unit is move against the wind take there normal move - the one 1D6 was a 3 then 1 inch off, if rolled a 4 then 2 inch off, if rolled a 5 then 3 inch off, if rolled a 6 then 4 inch off. if hit direct hit system on scatter dice there no wind. However wind changes after all the tornado have move.
If any Twister come to contact or pass though them that each model in that unit need do strength test
if roll over a object the person who place the object there need to roll a 1D6 and need to be greate then one or the object get suck up.
For any vehicle get hit or pass over need roll a 1D6 and make 4+ save if not that unit take 1 hall point then rolls 1D6 scatter dice the vehicle can take more hall damage if hit terrain.
Here some photo of us play this campaign.
Tau Empire vs Dark Eldar