I have spent an extreme amount of time in Sol B in my years play P99. Days of real life time at efreeti camp during low pop, high pop, exp weekends, etc.
You need to be able to push into efreeti camp and hold it. I've done it solo, duo and in a full party. Not once has anyone ever tried to take it from me/us.
If you're pulling them across the lilly pads at all you're technically not
in efreeti camp. If you can keep all the mobs down in efreeti camp then you are technically camping it.
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If you're keeping a majority of the mobs down very shortly after they pop, you're inside efreeti camp and some team of knobs comes along and tries to contest you for the camp. Then you have a petition on your hands. Petition in game. Take screenshots or record video. Make sure your log file is on. If there is no response in game. Petition on the forums with all your proof. Never post about a petition or incident outside the petition forums.
It's rare that you'd have to make a petition at efreeti camp unless you're not camping it properly. Nothing worse then a half ass cleared camp.
Can duo it with monk+shm, eyes closed auto running around the lava pit. While keeping all spawns down.