I play w/k in siege and buff to 230-300k mdef. As a priest in cloth honor gear, you should be able to get that much with w/p and k/p buffs easily. I wouldn't put too much emphasis on wisdom, as I don't think its needed that badly. I'd say at most 1 stam/wis on items, perhaps you could have your armor with stam/wis and none on accessories? Again, being tanky against magic based attacks is fine, but doesn't really help against the rogues you claim you're suffering from (or wd/w full burns should be equally perilous). Also, while it is true that resisting an attack is better, I personally prefer higher mdef (stam/mdef > stam/wis for mdef gain) due to it always reducting damage, rather then being a chance to reduce.
Don't forget as a priest/knight you have access to the skill Strike of Punishment. Its hard to hit on rogues (due to evasion), but it reliably hits k/m w/m wd/x classes who have little/no evasion. This prevents them from using physical attacks (white hits or skills), and can help you live. Also remember that holy candle shield + shield of discipline is basically an immune, as is shield of discipline + vn cape. I know it doesn't help against silence, but can help when you see someone going for you.
Druid/warden briar shield and/or multiple hhealers are the only reliable ways to survive a full burn r/m without using log duration cooldowns and praying. With high pdef honor gear you have a much higher chance to live, but solo, its hard no matter whwat gear you use.
This post has been edited 2 times, last edit by "BlankMinded" (Nov 8th 2015, 9:30pm)