I generally only drink once mage and shadow priest are empty.. for my warlock I use life tap to keep her in line with the rest.

If I spam the consecration macro, I can be sat on the hammer of justice cooldown for a while should I not need more AOE aggro - which works fine for me at the moment. But I Can see what you're saying, and should it begin causing a problem I will revise my strategy - I haven't encountered a major problem with healers, because I NUKE

Oh and since I'm doing instances 95% of the time, consecration spam works well because i'm always up against 3+ enemy.. well most of the time. If I do think it'd be a waste to consecrate, I will use a healer renew spell - which triggers DPS on the alts at the same time, without triggering any paladin spells.

Thanks for your Seal tip, when I tap the macro.. I generally stop after the seal of righteousness and I've not missed it yet. I'll see what works best for me.