Looks like all your toons are paladins? If so just level and get your greater blessings when buffs really matter. Each one picks a diff greater blessing and poof. All of them have all the blessings for 30 min with one press of the key. Else use smartbuff and just hit the key a bunch of times. No point in reinventing the wheel with a custom macro when its been done before with 10diff add-on's.