Rits make an extrordinary support class, they can really make everyone elses job easier. No monk worth his weight in tanned hide squares has ever said no to a rit bringing some extra restoration skills, and anyone who gets Ancestors rage applied through them is very glad they brought the rit along.
as for an actual general purpose build most of what people have said here is right on. [skill]ancestors' rage[/skill] is great so is [skill]splinter weapon[/skill] for damage boosting. [skill]life[/skill] [skill]spirit light[/skill] [skill]mend body and soul[/skill] and [skill]recuperation[/skill] are all great healing skills to bring as well.
one thing though, don't feel to constrained to simply be a support buffer all the time, with different secondaries and skills the rit can do many things more than hit their allies with heals and weapon spells. for example, [skill]barrage[/skill]+[skill]splinter weapon[/skill] is good, so is [skill]nightmare weapon[/skill]+[wiki]triple shot[/wiki], and in my experience I haven't found anything with a higher DPS from attacking than [skill]spirit's strength[/skill]+[wiki]weapon of aggrestion[/wiki].
just my two cents
