"Hey Guys, Im looking for the best MOD that will keep track of my Lifebloom no matter who i cast it on. Does one exist?"
Here's my trick to what you just asked, FIRST use this macro or variant of it
/cast [@mouseover, help]  lifebloom; lifebloom
this will cast lifebloom on whoever you put your mouse cursor over on the raidframe or player on the field, it's a generic mouseover macro... it will make WHOEVER you put lifebloom on your focus target, great for tank swapping as it automatically changes your focus when you put lifebloom on the next tank
NEXT get the addon Tell Me When, and set one of the boxes to watch spell: Lifebloom, Buff, Focus, Only Mine, When Active
now put that tellmewhen button wherever you want on screen, and when you cast lifebloom that icon will pop up with the wheel timer so you can watch the duration of it, sorta convoluted the way i just explained it so i'll link this post i made a while back that died on the forum here (thank you shameless plug for me YAY) there's a screenshot of the addons and two youtube video's of it in action, hope this helps!http://us.battle.net/wow/en/forum/topic/6232743675
^^ this is the forum post