So as far as Sweden is concerned your plan is to remove them or just gain enough southern territory off them to consolidate your foothold to the west under the Austrians?
If it’s the former then split them south to north isolating the capital city and pillaging any useful resource in your path, within 10 turns you should have reduced them to relying on medieval units and then you can take off them what they conquered recently with ease. Sign others upto deals so they wont declare on you but you wont need the others to hurt the Swedes.
If it’s the later then use your offensive units to push the Swedes east quickly capturing the new cities and consolidating your position, do this with a lighting war and make peace as quickly as you can, you may want to avoid making alliances in this situation as your going to want out of the deal within 6 turns.
If it’s the former then split them south to north isolating the capital city and pillaging any useful resource in your path, within 10 turns you should have reduced them to relying on medieval units and then you can take off them what they conquered recently with ease. Sign others upto deals so they wont declare on you but you wont need the others to hurt the Swedes.
If it’s the later then use your offensive units to push the Swedes east quickly capturing the new cities and consolidating your position, do this with a lighting war and make peace as quickly as you can, you may want to avoid making alliances in this situation as your going to want out of the deal within 6 turns.