Very true John.
If you're more the one on one type of person, then i'd recommend Warlock as A sub-mastery, imo Warrior / Cleric still can't kill as sweet as a Warlock, and they die way more, Cleric skills just prolong their death.
Warrior / Warlock = Very hard to play, this is one of the " need skills " type of build, mainly PvP!
Warrior / Cleric = A bless and fight type of build, without Bless/RD your just another Warrior, kind of PvP / Party based.
I have fought many many Warrior / Cleric one on one with my Warrior / Warlock , some were very good at curing/healing some are not, but mostly was my win, wheel bind, the ridiculous amount of stuns, and recovery grains xD
I never made a Warrior / Cleric maybe because I've seen them PvP Bladers and Bow, etc. Stuns KB's till bless is gone, and they die, RD does nothing agaist that DPS. IMO.
But anyway, both have pro's and con's. Neither are better than the other, they are just very different to play . Have fun ^^