I need some merit advice.

Currently I'm a Mithra 75 White Mage and Summoner. I'm leveling Paladin to 75 with a friend. Also I have Thief at 62 which will follow Paladin to 75, and I plan on getting Dancer to 75 as well.
I'm trying to plan out my "all jobs" merits to gain the most advantage across those five jobs. At the moment from the merit categories HP/MP, Attributes, and Others all I have is 8/8 in MP. So the questions become what is better...
HP/MP stick as current or will Paladin get more benefit from HP then my mages and Paldin from MP? As a note my White Mage Group 2 merits are 5 Shellra V and 5 Devotion so no Martyr.
Attributes I think Strength is the way to go or is another choice better?
Do I do anything with the Enmity merits? I think Critical Hit Rate would be important too.