User blog comment:Fistful of Force/AvS Pt 1: Annie Support Burst Potential/@comment-3308937-20131124220409/@comment-3565549-20131124231616

Ignite does a fairly large amount of DoT damage, especially considering Grevious wounds, making it a significant factor.

I've calculated over a period of 4 seconds instead of just one, because of the stun. It would be incorrect to think that there would be no problems disengaging, because the stun forces you to take about 2 seconds of free damage. Given your calculations, it would be pointless for Soraka to silence Annie because she has already cast all her spells, and more logical to silence the adc, who, if the time of engagement went over 4 seconds, would just need to dealabout 475 damage.