Runes of Magic US / AU

Hmmm I am sorry I hadn't seen this til now! I can give a few suggestions but a lot of things are completely viable with Ch/M (or really any Ch for that matter)

1.) 2 str/stam 1 str/pa 1 stam/hp 2 stam/def <--- would work well for your hp/def/pa
2.) 6 str/stam <--- High hp and def w/ some PA (Shield form works wonders)
3.) 6 str/pa <--- How I am statted, I go from 69k hp to 199k hp in shield form (lvl 50) and plenty of def and pa still in shield form... although I am a ch/r so my 70 eliete gives me a nice boost
4.) 3 str/stam 3 stm/hp <---- Higher Hp bit lower def
5.) 3 str/stam 3 stam/def <---- lower hp but nice def

6 str patt before you use your aoe nuke

7 piece honor gear (+ pdef + hp + mdef...however you want to stat) for the next 5min.
ch/m doesnt do enough base damage to be anything other than a meatshield/disrupter outside of its aoe nuke

champions are by far the easiest to stat, you can use str, stam, hp, def, patk viably.
Honestly I think you should just use the highest 6 of any combo of them including patk/def, hp/def and str/hp often considered junk and not worry about pattern so much you cant go wrong with that pool.

From that go with what your secondary is, obviously /r more patk and /m more hp heavy