Quite fun! :D Ended up finding a strategy that left me three minuets on the timer.
I'm gonna hide the strat down there if you wanna play and find one for yourself ;)
Okay, so:
Start out by quickly maxing either they idle or active asset production (Idle for if you're willing to wait, active if you're good at clicking a bunch), then max out hull strength and speed (speed might not need to be max, but might as well) and then just rush down to the bottom as fast as you can. You should have a simple time heading down and back, and then you're golden. Best of luck :)