Oh well, not really a guide since my priest is only at 1000 kills in 1-15.
However, I will share what I have done to make this unkillable priest.
Base build, 5 Wise 4 Rec. Instead of 4Wise5Rec, why? because I don't like the idea of healing less than a normal mode full wise priest in 1-15.
Use Dagger!!! Period. Dagger allows you to spam much much faster than a staff. I have seen a priest with dagger spamming healing and mp drains much faster than a priest spamming heal with staff.
Simply put, a priest with staff can't keep up with the healing.
Lapis:4 dual wise3, 1 lvl5 Life.
Final Stats:140 Physical Defense, 180 Magic Resistence. 1800 HP.
Heal 422 HP with Healing2.
1000 kills so far, only 1 death. (death occured when Ruth was playing the priest...)
This is the cheapest way to go with UM. Save lots of rez rune. I don't use cont. rez rune on my UM priest.
This build has better physical defense than my UM fighter. This build can easily tank 2-3 meelee's and still get out alive without a scratch.
only 3 skills you need to take. Healing, Instant Healing and SelfHeal.
You don't use your SP very often, however, SP does come into play when you got ganked and got your HP dropped below 10%. You need to spam selfheal like there is no tommorrow and this is when your SP will be drained quick. Pack 3-4 stacks of SP fruit is adequate.
Bring a HP remedy to boost your HP to 500. Bring a total HP to a whoping 2200. You are unkillable. (unless you got ganked by 5+ guys and keep getting stunt locked). A single whack from HM warrior/sin will only drop your HP by 1/10.
HP Remedy is a waste on those with low physical defense/magic resistence, since you will get 2-3 hit killed anyway, but it adds so much when you have high defense/MR, it is almost like you are on Defense Nos.
How do you want to play a priest?1. Don't even try to heal those 1 hit kill squishies. It is waste of your casting time and mana. If your teammate can sustain 3-4 shots, then you should keep your eye on him and try to keep him alive.
2. Always be ready to run when things don't look too good. It is unlikely that you will get ganked up by 5+ meelees, it will only happen if you are not paying attention to what is going on at frontline. Some sins may try to charge you with speed buff and then stunt lock you. Some warrior may try to stinger charge you, but be afraid not, those meelee warrior/sins who try to sneak up and attack you are total idiots. You make a good bait for luring their meelees to target you and let them strike first. They will only end up dying by getting ganked from your fellow lighities.
4. Stay away from front line (doh!) your worst enemies are archers who can drain your mana.
5. stand and overlap yourself with some other guy so who ever trying to click you will end up click on some other noobies.
6. Only heal -Extreme- as a priority. -Extreme- is sucidal all the time