On the shaman it will be difficult for you then, you can try the full t1 healing wave spam i never tried it but its probably easier for you then, than getting the other stuff. You can always pug for weapons on warriors, like nobody will place his prio 1 on something like obsidian edge blade they'd rather do it on the rag sword, which in my view has no big advantage in 5 mans because stuff dies too fast for the ARP procc to become relevant. Maybe also have one warrior for the aoe knockdown hammer (forgot the name) its helps with overall clear speed since your shaman will spend less time healing and thus less drinking which is the second bottleneck of you clear speed.
I haven't decided on a setup yet but since i never had the chance to do battlegrounds in classic with multiboxing thanks to the follow removal on retail, I'd probably run 4 shamans with a mage. So the mage is for convenience (water/portal bot) and later pvp only on the 4 shamans so I can have some buddy with me in dungeons or healing in BGs. For pve setup I'd run the warrior+shaman comp again, but honestly I think 3 warriors and priest shaman is even better because as I mentioned before the ravager is really competitive when you get to do big pulls, and having double heals would allow even bigger pulls that would eventually outperform a well geared 4 war shaman team.
#edit: earthshaker.