Well, there is no regen on the beginnning of 12.
But, why not cover everything? With maps like this, where you can stand on evey little thing, it's handy if there is regen+triggerhurt everywhere. And with unlucky I mean, you get regen, fuck up right away and start again, but didnt get regen because you failed/started too soon so you run out of rockets.
Seriously, just cover everything, how hard is it.