Since I've never made any totems out of teapots, I don't know if there is a trick to it or not, but some of our other GJers should know....

I make bird baths and sometimes the glass ware isn't flat I either put a piece of folded paper under the edge or use some dried silicone under it. Or I just put some dirt or rocks under the base. I used flat plates or old microwave plates for the base.
Hope this helps! Good luck!

Could you post pics so we can get an idea?
Is it something you could cut off with a glass cutter & still have the same effect?
You could put a patch in it of GE II and glass beads, then use beads elsewhere to blend it.
If it's big enough you could get a salt bowl & stick in it.
If you have other broken ceramics you could put in a ceramic patch.
If you're using plants, you could possibly put a plant in it, though that could get to be harried come winter.

I have ground down the high side and I have also built up the low side. For building I usually use marine epoxy (the green and white tube epoxy that you knead together until it turns white). I build up the low side as much as necessary, then graduate the epoxy until it's even with the high side. Does that make sense? That makes the rim even without any gaps. The epoxy dries very hard. I paint it if it will show when the item is finished.

all good ideas, thanks, I plan on working on the totem if it every stops storming, and I will post pictures. the friend I am making it for chose the small pitcher, so I have to put it in.