Hmm, "less to keep track of" for summoners is a horrid reason to use macros for them. If you keep refreshing dots before they run out (since you'll most likely go through your whole Bio II -> Miasma -> Bio), you're losing out on ticks from Bio II and Miasma, thus increasing your mana consumption by nasty amounts. Plus, you lose a few GCDs for inefficiently refreshing debuffs... in exclusion to clipping with Tri-Disaster in B.Trance.