If for some reason you can't get Ramsey and only care about the talkgroup "St Paul Fire Dispatch" (11522), you can also get that on Hennepin East. For anything else St Paul fire related, you need to be listening to Ramsey.
City of St Paul Fire does not (to the best of my knowledge). The suburbs of Ramsey Co do on: 154.190/154.220 Ramsey county fire east and west. If anyone knows otherwise please post!