best guessfactor place
Most top bots use DC in their movement.
As for guns, Tomcat is the best bot without DC but does not use GF. XanderCat is the best bot with a GF gun but has multiple guns to go with it(it's not completely GF). The best bot with a single GF gun that I know of is WaveSerpent(Gilgalad has 2 GF guns).
By the way... you could have easily found out yourself. Look at the bots wiki pages.