Melee Scoring and Aggressive Movement
Yep, this is a very valid strategy, at least until there are 4 bots left. In the beginning of a round a lot of bots behave like panic, don't know where to go, don't know where to shoot. That is the time to be aggressive and score your bullet damage and up your energy level. But when you're down to 4 (or 5) bots it is time to hold your horses and change the strategy. Although cornering an opponent is a good idea, the journey to the corner will probably be fatal to you. Even in higher weightclasses DoctorBob plays a good game, with a relatively high bullet damage. Its survival is also ok, but he hardly ever reaches the last 3 because his strategy fails at that point (but what do you expect from a nano).
I would like to see a 'micro-DoctorBob' with a secundary strategy for the endgame, although its gun would probably not be very effective at larger distances.
As a side-note: To some extend Gruwel is using such a strategy. Although not as agressive as DoctorBob, it certainly does not flee and (tries to) take out everybody near it. In the endgame it starts shooting peas (distance-dependent) to try to boost survival.