Well what id do differently from the bomb idea is that you would have to create a platform and then build a bomb cart and you can craft it onto here but it would spit out a explosive jar for you to pick up and up to five can be created thus you would need good logistical team to effectively take out a base.

At the same time archer should be granted a 1/4 chance of using a flame arrow thus kaboom the one guy carry the explosive jar … if these archer are using the funcom new turret system.

For the defensive side if all thrall are taken out and or you have blown up the one vault per clan … id consider the event over and all raiding damage to this base should be over and this you take all the loot you see but a destroyed isnt actually poof its just has an appearance of a damage vault and only 1/3 rd of its content is available for taking. Thus it become a successful run but also allowing defensive to rebuild and plan better on how they got raided.