Well then why don't you prepare before going in?
Get full buffed, stick to your pally and go with bios or WSs to have access to additional pots. Also bring a priest if you can to keep your buffs on and get clowns/gypsies & profs to turn down the def at the emp room.
Solo breaking is a thing of the past now so organize and hit with a bigger group. The defending guild is alone while every guild can in theory attack the same castle. If you do coordinated attacks with alliances, defending guilds will have a hard time.