45 second 15% Balance versus 75 second 10% Balance ... which is more effective?

[Eudyptes]

It's all situational really. In a raid, the AE version is almost always superior. The only exception is when people are too far spread out to hit most of the raid. In smaller groups or when people are spread out too much, the enhanced is superior if you can land it in sync with their CD's, while extended is better when you have 75 sec to beat on the mobs and have no major CD's up (or when they come off CD after 40~ sec).

With that said, you also need to take into account the cards your burning (unless you're just talking about pre fight prep). To get enhanced, you need to burn bole or balance. These are two of the three most important cards ast has, and in general it's not worth burning either of them during a fight save certain circumstances.

Extended, being ewer/spire, can be burned more often. However, it's still highly situational. For long, drawn out fights with few to no phase shifts it's best to just use them as you pull them, so long as the fight didn't just start or people aren't already topped off. For shorter fights they aren't very necessary and can be RR'd freely.

For expanded, arrow is the other card of the top three best cards, and should be used as you pull it. However, spear is the polar opposite and is almost entirely RR fodder. It's only real use is to be used on yourself before using Luminiferous Aether, and maybe on a tank/healer if you can coordinate well and hit them before they use CD's. Otherwise it's crap, and pretty much useless for dps.

In short, there's really no simple answer since there are so many variables. If you are asking simply for pre fight purposes, I go for enhanced in 4 mans, and expanded in 8 mans. Otherwise, you have to weigh all of the above in the encounter you're in.

Edit: Actually, my mind might be on the old RR system still. I keep getting my RR cards mixed up, but the principle's the same.