Among the best in the business: two to three weeks is routine on Zeus Z and M Series mesh, part of the same durability focus that gave the Aegis its armour. Prime for five minutes, respect the printed wattage range, and they earn their price per week.
No; they are different diameters for different Zeus tank generations. Check which tank your kit shipped with, or simply match whatever coil is in it now. The pack listings name their tanks to remove the guesswork.
Go for the higher-resistance options in the Boost, P or G families (0.8 ohm and up) at modest wattage. The big sub-ohm Zeus coils are built for high-VG shortfills; 20mg salt through one of those is a very unpleasant surprise.