Om inte ska ta taxi, vilket alternativ tror ni blir bäst?
Too late to help, but I found Bolt between Bromma and /Kungsbron for 122-135 SEK on Sundays using yet another discount they keep sending me. About 23 minutes travel time + several minutes wait time at times. And then from Stockholm C, I pick what to do the rest of the way to get to ARN based on how quickly I want to be at ARN: Arlanda Express if in a rush and not going to barely miss the scheduled train departure; or flygbussen if not in as much of a rush and not about to miss the scheduled flygbussen departure; or, if having way too much time, the pendeltag to Märsta + the SL bus 583 from there.
I usually ask to be dropped by the Comfort XPress and decide from there, as there is both the elevator nearby to go down directly to Arlanda Express tracks toward the side of the hotel closest to Vasagatan/Ostra Jarnvagsgatan + the flygbussen/bus station is accessible from outside on the side of the hotel closest to Kungsholmen.