Havoc laser is so awesome. Try it.
It has secondary fire that does damage, and faster than default primary fire that is used for laserjumping.
But faster fire rate on primary mode allows for incredible pushing around against walls and ceiling and stuff.
In general havoc laser is superior to nexuiz laser in every way. The only possible drawback is that currently laser secondary does weapon switching, but since we are going to have Q button for default weaplast, it is just fine to ditch that feature.
Please vote to make havoc laser default in nexuiz too.