OFB-8

YaR buys 4 Efreet with growth, adding them to the two he already has, throws in 6 level 1 Imps, and then uses a spell to attack my unit consisting of 4 Gogs, 8 Imps, and 4 Dogs. In the first round, after the haste buff, the Dogs move to the center, and one Imp dies from the Gogs. In the second round, the Dogs die from the 6 Efreet, and one Imp dies from the Gogs. In the third round, the Gogs die. The opponent has lost 2 Imps.
But without growth, 2 Efreet can only take down two Dogs, and the remaining pair of Dogs finish off the third Imp. The difference in losses is 1.5 times.

Why doesn't the rule work:

2.1.1. Red-rush is prohibited:
b) on heroes ..... if the presence of growth can affect ..... the losses in battle for either player.

Considering that in the last quarter, 20% of my games end with my red-rush, this issue is very relevant.