Ifrit HM is actually a decent place to use the Tank LB if you don't have LB3 for nails and DPS is too slow. The Hellfire damage can be survived with a LVL 2 LB if you have better than AF gear. There are Garuda XM strats also where you leave Chirada up and use Tank LB for Mistral..Shriek?

However, in the OP's situation, there is really no situation at all in a 4 man where a Healer LB will be more useful than a dmg LB. Especially if your criteria is 'the party had taken a lot of damage'.