0. Before following these steps, try working it out with the group, if the group is unwilling proceed.
1. Identify two areas that are RIGHT in the pull path of the AOE group, and as close to the AOE group's pull area as possible, but out of sight of the pull area and out of sight of each other (e.g. Area 1 is out of sight of Area 2, and both are out of sight of the AOE group camp). Make sure you can kill the mobs there with your killing force (group or solo if you can). It doesn't matter if these mobs drop pipe. Just make your intent to camp them for whatever reason (e.g. exp, or whatever) clear, but if they can spawn a pipe mob all the better.
2. Inform the AOE group that you want to camp one of the two spots, they have to give you one of the two at this point.
3. Kill in mobs in that spot to prevent the AOE group from pulling large pulls through you.
4. Revisit 0 to see if the AOE group will now work with you - if not, go to 5.
5. Play the waiting game, killing your mobs in your camp, until the AOE group and their proxies get bored of not being able to pull through you and leave. Now you can camp the pipe mobs. Or perhaps the AOE group will offer you a pipe.
You should have fraps on at all times throughout this process and taking logs / screenshots. Good luck.
Disclaimer: I am not a GM. I take no responsibility for the outcome of trying this :P Unless it works, then it was all me.
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