Well which one is better?
And which alchemer is the best?
I want to use it as a support gun for my bombs for killing of the odd creep
Im thinking of:
Prismatech or
Cryotech
which one of these two is better? Is it worth to have the extra elemental damage and have no status with it?
Extra damage is useful.
Look up "experience with hail driver" to learn whether you want a freeze alchemer or not.
Supernova is just a high knockback normal gun. Not preferred, as it is normal, and polaris does the job better with elemental damage and shock.
For killing, doing dps, alchemers are better. Unless you need a turret gun, which is polaris.