Hhmm, guess I explain it some.
Their gate was near a cliff, where we could shoot the gate without them being able to shoot us with their cannons. Everyone in the guild also had Kegs and the portable siege cannons. At start we rushed to the gate, spawned mortars below the cliff and in front of the gate and used kegs and siege cannons on it. Meanwhile a really really strong 7 man group started shooting the wall, we planned to breach to soften it up already. We additionally rolled in 2 siege towers near the gate to keep them busy on the walls and distract them.
That was phase 1 and it worked well. I think Gate was down after ~10 minutes and when it fell, the wall was nearly dead aswell, because they couldnt afford a strong enough group to kill our wall-group.
Phase 2 was fighting them at the breach and taking down the wall protecting the lodestone. Again, a shitton of mortars, additional siege towers to get on the walls to kill cannoneers and some trebuchets just to keep them busy. I think wall fell shortly after their reinforcements arrived.
After that it was ~30 minutes of fighting around the lodestone. We mostly killed it with normal attacks, because they couldnt clear the area around the lodestone and we kept them at bay. The defenders were retarded and send like 20-25 people to flank us, which we could easily fend off with ~10 people. which weakened their main force at the lodestone further.
When Lodestone fell, we spawned everything at the breach. Mortars, farm carts, farm haulers, pets and made sure to rush out to kill their mortars, when they spawned them.
Thats how the breach looked and you can also see the Anthalon set clicky, which is absurdly strong in mass PvP.