Just wait for the next release, which hopefully will come soon. The problem with the last release was that bots were switching weapons too often, and that was making them take longer to aim.
Some other people told me recently that "godlike" bots are somewhat easy to beat, I don't think they're *that* easy for newcomers, which are the main audience for playing with bots. Unless bots become hard to predict or they can predict players .. well they will always be really easy to beat for mid-advanced players. Also bots skill goes from only 0 to 10 and it is interpreted linearly, by this I mean that it'd hard to get a real-godlike bot while keeping lower skills easy to beat. I don't have a good idea for "fixing" this yet, but probably I will add an extra skill 11 with some special config, or open the skill range from 0 to 100 .. any suggestion is welcome.
However, there is a cheap way to make them stronger just by making them aim faster. You can read about the bot aim configuration here
http://alientrap.org/forum/viewtopic.php?p=30206#30206, it is not exactly easy to tweak but you can give it a try. If you get a configuration that is challenging for you please share it here so I can use it for tuning a new godlike configuration.
I'd like to have more challenging bots too, I'm currently working on advanced map navigation, less predictable map navigation and probably make them predict player movements. I prefer to play against a smart bot instead of a Terminator-like bot
Feel free to report any other bug you find at
http://dev.alientrap.org/projects/show/nexuiz