The P/W combo is neglected, but not by Runewaker. But by the people who play the PRIEST/warrior as a warrior in Cloth gear.
The way you play a class-combo the way you see it, does not mean it is the way the developer sees it
If you want to wear leather or even chain, switch to Warrior/Priest and never look back.
Recently I've regeard my Battlemonk from full PDD to a more hybrid approach in other words:
I went from mem-cloth gear with melee ghost stats to healer gear with melee stats. In Instances I am a healer, not a DD, while outside instances I am a pdd.
Currently I'm lvl 80/76 and I run around in Sarlo with lvl 72, 75 and a few pieces lvl 77 Shell healer gear, most of which is not plussed or statted! and still I walk away from killed mobs with 100% HP!
Few stats about my Battlemonk fully self-buffed: (with BMS, P-Bu, GoL, AA, Cond Rage)
44K HP
5K Pdmg
18K Patt
52K Pdeff
51K Mdeff
Using a Original Sin +9 T4
Condensed Rage gives me 17K HP back, while FSC (with the lvl 60 elite) gives 4,5K HP per succesfull hit so 2 hits equals 9K
In a timeframe of 30 sec, that sums up to 4x 9K = 36K HP return totalling it all to 53K HP return every 30 sec.