@OP: I can confirm that in the Beta, Bandos works very efficiently. It's the best non-degradable armor you can use, so for doing grinding like Slayer it's definitely the only bet to make. In the current live game, Bandos is a necessity for mains; in the EoC, it's still just as important. However, the Bandos Helm is actually the nondegradable helm of choice in the EoC since Neitiznot has no critical bonuses (i.e., strength bonus). The same goes for Bandos Boots being better than Dragon Boots; both don't have any strength bonus. The gloves are worse than Culinaromancer 12.
All in all, keep your BCP/Tassets and buy a Helm and Boots now while 90% of RS is too stupid to realize it.
Yes, Torva is better, but it's still degradable and completely wasteful if you are slaying or grinding. Torva costs 200k GP/hr, and in conjunction with two chaotics, your total cost/hr just for degradables alone is 600k. Adding in potions and food, it's probably 800k-1m GP/hr. That's pretty significant. Torva is still only an armour that should be used for looks or for bosses.