Board Thread:General Discussion/@comment-36016297-20190303163405/@comment-35148884-20190324051942

Yes, when you try to activate the second one... something to the effect of "you already have a similar talisman in use" The restrictions seem to focus on combining talismans that boost energy, but I think you can still combine others. Last time I used the Magic Ingot (100% more coins for 2 hrs) I was able to combine it with the Midas Touch talisman (50% more coins for 1 day). Have not tried this in quite awhile now, so I've no idea if it's still viable.

You could experiment with this on your own, but I would suggest using the talisman you really want to use first, just in case ;)