I wouldn't do that. Mage, tank and two good dd seems to be perfect for this DLC.
Have you tried putting Revival on priority? I don't do that personally, but I've heard it helps.
I haven't gone into the behaviors yet, but I may need to. Thanks for the suggestion. I took revival out of his eight slots since he used to do a good job of reviving on his own, but now I feel like I have to make him do it manually, which means one less spell slot.
TBH, I'm not really keen on having to be so strategic, so looks like I'm in for a trudge. The first big darkspawn battle everyone but me died and I was almost out of healing pots, on casual. LOL Granted, I wasn't being very careful, but, ugh. It's also been about six months since I played regularly, so I'm rusty.