Define "traditional." There's a couple other algorithims that came before RGBM.
I'm assuming you mean the Navy Tables/Haldanian vs bubble models, but I don't know anyone that runs Navy tables unless it's on some submersible backup tables in their pocket. I also assume that you're interested in RGBM because of deep-stops, which there's some studies on showing it's effectiveness. RGBM is not the only model crediting deep stops.
For instance, in V-Planner you can run either VPM or VPM-B. From what I've read, VPM-B is VPM but with padded time at the shallow stops for extra insurance. I leave V-Planner select which one automatically based on it's criteria for each specific dive, and it always chooses VPM-B(I'm diving OC nitrox/air with ~30min BT's above 200ft). The Variable Permeability Model(I think) credits deep-stops, and from what I've seen V-Planner is without doubt the most popular decompression planning software.
Another example is the algorithim used by Oceanic(and it's sister companies) on it's computers. I think it's called the Rogers. It's liberal in no-decompression diving, but ridiculously conservative on repetitive decompression dives.
On the Dive Rite computers you can choose how conservative you want it to be. They run a variation of Buhlmann.
Most conservative thing to do would be just run tables. Nothing more conservative for planning your schedule based on a depth you weren't at for more than a few minutes...a computer will ride the curve, naturally meaning that you're pushing it.
I know I didn't answer all your questions directly, but hopefully gave you some info to go off of. Sounds like VPM-B on +5 conservatism might be what you're looking for.
EDIT: Went into V-Planner to run some tables as an example to you. Found out that it's VPM-B or VPM-B/E(padded shallow stops) that you can run. It also won't start making a difference till you hit about 100 minutes of deco.
V-Planner:
http://www.hhssoftware.com/v-planner/index_gs.html