If you want to keep it mono-light, there's not much you can do. Light has no PC or CC, and its creatures in a mono deck aren't made for rushing.Have to disagree. Mono light can be a fast rusher, blessing + pegasi is win. However, the cc in ai3 can slow it down a lot, especially rewinds. On the other hand, there is actually a rather big difference between farming ai3 and farming halfbloods. If you want to farm halfbloods with a pegasi rush it might actually be easier than farming ai3, as the random halfbloods deck have less cc than some of the ai3 decks.
I'd get an air mark, replace the crusaders with pegasi, and bless them- if you want to keep it mono-light.