MNK to the left SAM to the right and in the middle is?....

[Enjuden]

The answer, bluntly, is don't play dps. The timers/positionals are part of what makes all dps function. Without those, you do less than healers. I'd suggest playing a tank and you can 'ignore' most of the issues you have with dps in general. However, you're still going to run into the whole timing thing if you do want to play them at an optimal level.