Missions for additional skill points?

I know Propheses had two 15sp quests. I found one in Factions so far..is there another?

yes

the second, you will get after completing the second mission.

if you are talking bout Rans Garden I found that one (after Min Cho Estate.)

I heard there was another..but where>

As he said. You end up in Seitung Harbour; look around for a !.

Its the Horse/unicorn looking thing by the bell that will give it to you if I remember correctly. He is in an odd spot.

In Seitung Harbor, there's a thing called a "Zaan" wich is some kind of... orange horse with dragon features. It will have a quest once you complete the second mission.

Just to warn you, it's possible to do that quest with henchmen (I did so with my ritualist), but be prepared to spend a lot of time. That quests takes you trough the entire map of the second mission looking for purple plague spots. But on the good side it shows you a shortcut to get to the end of the mission faster.

thought u had to do it afta the mission? either way its easy, only hard bit is possibly the boss if ur doin it with only henchies