Two lines? That's all you've got for me? I don't mean to taunt, but...
Maybe if any of your information was accurate I'd post more. As it stands, everything you've said has been complete misinformation. You can't join a GC until 25. You can't chain mobs below your level and even if you could, there is severe downtime between fights now because mobs hit so much harder, so you'd break the chain after like 1. You can try linking mobs, but again, because they hit so hard you will either die or have to full rest after each one.

Next time you try and "win" an argument, at least have some clue that what you are talking about is accurate information. =/