Originally Posted by
AmiableApkallu
That is all, completely, flat-out wrong.
The most flexibility is provided by, "If you wait Long Enough™, you will get back up to 10k MP."
I can do whatever I want while waiting. I can /cheerjump. I can cast Thunder spells. I can consume Polyglot stacks. I can stand around twiddling my thumbs and literally doing nothing. It doesn't matter, as long as I spend enough time.
Not every piece of content and the conditions under which it is done requires optimal DPS. And for the content and conditions that do require optimal DPS, part of the fun is figuring that out and getting good at it.