First, you should tell your stat ratio. Without that I have to guess you go all Str with some Con and Spr. Then you should tell you goal - PvP or PvE. Because you pick Monk, I will guess PvP.
This is fine but I think Priest c3 is a bit better. You will have a lot of Monk’s attack skills, so you don’t really need Smite from Paladin. At Priest c3, you will get Stone Skin which looks better than Paladin c1. You will have more survivability with Revive, Stone Skin, Iron Skin and Golden Bell. On offensive end, Double Punch with Bless and Sacrament is so good in PvE. If you have max both of them at Priest c2, you should max them at Priest c3 too. If you need the magic defend, you can use cloth armors. I know some clothes give Int stat but it is still better then waste 1 rank to get Resist Elements which can also replace by having your Paladin teammate or buy the scroll.
Finally about Monk skills, the point distribution can be varies. I might what to have less Double Punch just because I want more One Inch Punch and God Finger Flick to do more burst damage for me in PvP. About Iron Skin, I know it is a situational skill but you might get it at least level 1 by drop 1 level of Palm Strike or Hand Knife.