My math is based on YOUR own wws link, for YOUR patchwerk fight. Not really theoretical. Added, if your guild is doing things like sarth 3 drakes, you will be like mine, not really caring about the ads on fearlina or maexxna. Which tbh, negates your argument about aoe damage on those fights, as the AE damage really does not matter, and makes no difference to the fight. If anything, it could annoy you ads nuker in 10 man fearlina more than help. So you wait for those lil ads to come on maexxna just to pop starfall? please, the only dps you need to concentrate on in this fight is nuking the boss and occasionally freeing cacoons. The fights mentioned do not have any neccesary need for the AE dps, the only fights that AE dps is IMPERITIVE is sarth 2 and 3 drakes and gluth.....maybe noth, but your other dps should be downing the mobs aswell, so unless your raid fails, you shouldnt have more than say 3/4 ads up at a time.
Anub'Rekhan.........wtf does AE dmg have to do here from a druid? you swap dps between two ads and rekhan himself....... the occasional scarabs come out, but yout better off spending the point in Typhoon for that situation, as other dps will nuke them down to, giving your Starfall little point in being present for that AE purpose.
In both situations that you linked, Typhoon will still come out ontop, as, over time, you can cast more Typhoons, and as the situations in those fights have multiple times where you can AE (not that it is vital to the killing of the boss) Typhoon is more viable for the situation.
Anyway, we have already figured out that Starfall is only a viable spell for SITUATIONAL fights. and there are only 2/3 where the AE dps from it is needed to aid a boss killing.
We have already done some math from a fight based on tank and spank (which was part of the argument for single target use) where it had very minimal dps increase.
Conclusion; Starfall in its current form is very minimal in dps help, any 'shining' areas are purely situational. If, like me, you really have no where better to put that last talent point of yours, then shove it in Starfall. If your not so topped up on gear, or your raid composition lacks any mana regen classes, then tbh, your better off spending it in a mana regen talent (if mana does trouble you that much)
Its not totally useless, but until it gets buffed, depending on your gear and raid composition (again situational variables) It lacks what i call 'a decent spell'.
What alot of people are trying to do, it mix in factors where dps doesnt matter....like AE damage to the ads in say maexxna or fearlina. The main focus of you dps in those fights should be the main boss, not the AE ads. So, yes it boosts your dps within the fight itself, but not neccessarily does more damage to where it matters most, which is on the main boss.