Found it! 447 skill tested here:

http://wiki.ffxiclopedia.org/wiki/Talk:Avatar's_Favor

200 swings, 49 DA : 24.5% DA

147 swings, 35 DA : 23.8% DA

Assuming this is calculated correctly, there is nothing wrong with our buffs. You can enfire, 8% attack, and 24% DA the whole PT. That's considerably better than Hastega.