You absolutely don't need Cooldown unless you want 3 in a row; I've done back-to-back maneuvers since I've had my buffoon's collar way back at the beginning. It's true though, rotating is extremely helpful for keeping your heat levels low.
Also, the DAD method *does not* reset your burden to 0. Every time you Activate your automaton it will begin with a large amount of burden on each element such that a single maneuver can put you into overload. Always be cautious when you DAD your auto.
Edit: As for advice to the new PUP - If you have three maneuvers up and you want to refresh them, it's good practice to wait until the previous one expires before putting up the next. This is because the time it takes for a maneuver to wear off is roughly the same as the time it takes for that maneuver's burden to cool down. This way, you're maintaining equilibrium rather than building burden. Your overload rate will drastically decrease if you do this. Of course, best advice of all is to not get too impatient with maneuvers.
