Talk:Swain/Strategy/@comment-76.84.51.37-20120424194814/@comment-74.51.192.254-20120522135727

Let's see if I'm right here. Ravenous Flock is healed for 75% of the damage done to champions, so let's assume that there are three enemy champions, with one raven hitting one champion. Since aoe spells reduce the effectiveness of spell vamp to 1/3, you gain 1/3 of 20% of the damage dealt by each bird, which is equivalent to 20% of the damage caused by one bird. Also, let's assume that you have no magic penetration whatsoever, the enemy champions have no MR (to get the true amount of damage dealt), and you used the recommended item build, with the exception of that extra catalyst; to make room for WotA, and sorcerer's shoes; to factor out all dat magic penetration. That's a total of 320 ap (Rylai's + DFG + WotA + RoA), so each bird from Ravenous Flock does 90 + 64 (which is 0.2 * 320), or 154 damage. You initially gain 75% of the damage back from each bird, so you would gain 115.5 hp back from one bird, or 346.5 hp from all three birds together. Then, you add in the spell vamp from WotA, which is equal to 20% of the damage dealt by one bird since 1/3 * 20 * 3 = 20. 20% of 154 is 30.8 hp, so the overall amount of hp you will gain back is 377.3 hp. When you do the math, 30.8 is approximately 8% (30.8 * 100 / 377.3) of the total hp regained from his Ravenous Flock, so it does not really make a substantial impact on the overall health regained from Swain's ult.

TL;DR: No, Will of the Ancients does not help that much, for it only factors for 8% of the health regained. You are better off getting Rabadon's Deathcap.