Mab teleported in Peace Talks into the back of Harry’s car with Lara, so yes she doesn’t have to use the Ways. I presume Maeve could teleport BUT it is probably a proportionately higher power drain for her, and something she doesn’t do casually, especially if it is the part of the year where Winters power is waning.
Peabody came through the Way from Edinburgh to Chicago where the Spiders were, at that point he met up with Maeve, she teleports him and the Spiders to the island, but doesn’t take part in the battle because she needs to recharge, she is able to teleport Peabody off back to Chicago, he goes back via the ways to Edinburgh.
Rashid knows and is able to traverse the way to Demonreach, which probably requires currently going through Tartarus which means Maeve and Peabody wouldn’t try it even if they know it, they would be no match for Hades. Rashid wouldn’t likely have that problem. Tartarus likely backs onto many famous ex prisons - Alcatraz, the Bastille, the Tower of London, the demolished old Tolbooth in Edinburgh so you travel to a waypoint near one of them and go on the tour, pick up the way to Tartarus and then back to Demonreach.