Except for :
bert_the_turtle wrote:If "not doing anything else" includes "not even interested in watching my brillant plan unfold in all its glory", then the answer everyone would give, I think, clearly is "as fast as possible". That doesn't help us, of course
Even when doing nothing, at certain points of the game, when your opponent has the capability to surprise you with a massive attack (bomber+sub ..etc or any other combination). It is a lot safer to stick with 5x-10x so that you notice this in time and you are able to counter it.
Ps: Regardless of this though, it's always fun (at least for me) to watch yours or other player's "brilliant plan unfold" .