I just played an 8 bot free-for-all in ESF_Cell_Day as Piccolo... it was fun, if insane, and I ended with 108 frags/20 deaths, with the next bot at 21 frags. If they're not in a team I can comfortably take eight at a time now, especially as I've finally become accustomed to their little traits.
Basically, they're easy to melee if you've adapted to 1.1 melee like I have. Ki management is essential, as well as taking advantage of bots when they're busy - they're great at dodging SBCs EXCEPT for when they're in mid-swoop. Silly bots. If you swoop, cancel your swoop, charge up and swoop again, you can do this while the bot has one long continous swoop. Result - one bruised bot.
They also have short attention spans and will attack whoever is closest. Teleport away until they find somebody else to focus on, then swoop in and hit them. When there are eight crazed bots around, watch the radar and the minute a dot closes in, face it, block, and prepare to teleport and counter attack. The bots, being silicon as they are, can't adapt to anything intuitive.
Though I've comfortably conquered them by now, these bots are still far beyond anything else I've ever seen in a mod. And bot support is essential for me - with a 56k modem and a dubious ISP, I only play on LANs. This makes practice difficult, and bots have proven more than effective. I'm really pleased the bots are an important part of ESF and hope they'll move on to the later version as well.