Commander scrooge: those values default to 2, which is stage 3. I think you meant setting them to 1 to limit to stage 2, but that also removes hives/tesla/lcannon not just bsuit and rant. A better way would be using disabledclasses and disabledequipment keys.
Zybork: I recommend you don't remove any classes/equipment, instead make the map to suit what Tremulous really is, and not by making rants/suits unusable, maybe just add places they can't reach, like behind crates/barrels, or in vents.
Neither ATCS nor Tremor have good places to hide from rants (except Tremor basement where rants rarely go, and vent at alien front). Instead look at maps like nexus6 (Generator top to mid floor and most ways from pipe room top to bottom too small for rants, pipe room bottom has many hiding places, all stairs have a hiding place near them, etc) and Niveus (plant room plants block rants, several places behind boxes/barrels and under stairs at stairway bottom and 2 places near window room should be safe, etc). Maybe you have not yet learned to fully utilize those parts of the maps? I haven't yet tested whether rants can now hit further and to some places that used to be safe in 1.1, but many are definitely still safe to use.
Also make sure that if aliens can evolve to rant in some area, they can still leave...