if it does it using the number of units instead of the population then you lost 204 units, which would be within the limits if you send between 680 and 2040 units.

i haven't worked it out, but i don't think it would make much difference whether it uses FS or # of units as the measure, as long as it used the same measure in calculating the size of the attack and calculating the casualties.

like i said though, i dunno how they choose what the spell targets, but it seems to hit bigger targets (more population) more frequently then smaller ones (single FS units), and i don't like that very much at all.

**EDIT:**

just for the sake of it lets check it out for an attack consisting of

10 catapults, 200 horses, 300 slingers, 300 hops.

total FS: 1350

10% = 135 = 1 catapult, 20 horses, 30 slings, 30 hops.

30% = 405 = 3 cats, 60 horses, 90 slings, 90 hops.

total # units: 810

10% = 81 = 1 catapult, 20 horses, 30 slings, 30 hops.

30% = 243 = 3 cats, 60 horses, 90 slings, 90 hops.

so the effect is the same however they calculate it. the only prob is that higher pop units seem to have a proportionally higher chance of being hit :/