Well you'll probably find the settings for the sim may make a big difference, it sounds like you would want a larger sim with obstacles and a low supply of food (Not sure about fluids and cost settings and such though).
Also I think tweeks make a huge difference, so choosing how to define strength by weighing the value of shell, poison, body, energy, asf, could prove hard... and when are you damaged enough to consider yourself injured. How good a bot is at making an escape, or chasing someone trying to flee, would make a big difference. And the ability to flee would also depend on the population of bots, the more bots there are, the harder it can be to keep track.
So I think the end result would probably reflect how well the strategy is implemented rather than which strategy is best.
Also when it comes to evolution being too good can be a bad thing... just because you can overcome the other species initialy in a small environment it does not mean you're the most fit to survive on a global scale. Often the most agressive bots will destroy the more passive ones, but they will usualy also depleet their food source rather fast. Part of survival is having the right balance with your suroundings, procreating when theres plenty of food but holding back during tough seasons.
I've has a sim running with a large field and very litle food and thin liquids. For that particular environment it seemed like the most passive strategy was the best, the bots stayed small and many and spread out looking for food, if one was lucky enough to find an alge it didn't kill it, it just kept feeding off it while nudging it around in circles, reproducing in order to stay small and keep shot damage low to avoid killing the alge. Whenever 2 bots met in the open they would shoot at eachother, but also try to move around eachother. However if fighting over an alge they seemed more agressive and would tend to engage eachother, if one got too injured it would start reproducing rapidly into a swarm of litle bots of different sizes, making it possible for some of them to escape and hopefully have the oponent chase after a tiny offspring while one of the larger ones makes it off with the alge.
So for that particular environment with just random mutations, it seemed like being quick to flee was a good strategy, but any other environment could show something different. And who knows what could have happened over time in that sim, as the bots got better at surviving and increased in numbers a carnivore could have the oportunity to arise... although it seems like the acattering escape strategy of the bots made it realy hard for any other bots to live off them.
