I'm not a fan of 24/7 servers, I find they get boring after 4-5 rounds of the same shit over and over again, especially if there's an imbalance in the teams.
Don't go with IO, it messes up the balance of many of the maps, and frankly it defeats the whole point of the Battlefield style, that of mixed combat.
Ghost Town, Surge, Mass Destruction, two rounds of each with team-swap (so you play a round on each side). Maybe four rounds, but still switching between each round. Gives you enough variety to stop people getting bored, but not so varied that people get annoyed at randomness, or pissed off at constant map-loading.
Don't go with IO, it messes up the balance of many of the maps, and frankly it defeats the whole point of the Battlefield style, that of mixed combat.
Ghost Town, Surge, Mass Destruction, two rounds of each with team-swap (so you play a round on each side). Maybe four rounds, but still switching between each round. Gives you enough variety to stop people getting bored, but not so varied that people get annoyed at randomness, or pissed off at constant map-loading.