I did a search for "toppling the towers" and didn't find anything, so my apologies if this is a repost.
Anyway, in 3.2 they boosted the range in which you receive XP and quest credit while in a party. You are now able to AFK LWG inside the keep and receive quest credit for tower toppling, killing and siege engine destroying from very far away. I prefer to AFK in the SE tower while defending, half-way up the ramp or so. Rarely get ganked, and receive ~17,000 honor per character twice per week, with almost 0 effort required.