If you have already added texture to base like I think you have then this is a pain. I don\'t think superglue will do. It\'s quick and relatively strong, but shears so easily with small knocks, especially on large objects glued together.
If the base is done, then 3 choices really I think.
1. Get rid of first base, start again by gluing mini to base first before texturing.
2. Use something like Araldite Rapid. Apply this fairly thinly and prop the mini in position until dries.
3. Use some milliput or green stuff to stabilise around the feet when glued and texture and paint.
I personally think you might be best with 1 as texture of base will prevent good tight bond with glue.
Hope helps.