You must not know about how fast grease orbs can take down T3 walls. I can take down a T3 wall in less than 2 minutes. Grease orbs despawn after 30 seconds. You have time to stack around 28 grease orbs and then ignite it with a fire orb. Refresh that fire with one or two fire orbs and bye bye T3 wall. Costs nothing and invites more offline raiding because of this method. Fast and expensive raiding that takes lots of time to farm mats for Raid and requires multiple people to achieve the goal result in more online attacks being that they have a higher chance of success even with the players online defending. Slow and cheap raiding mechanics, of course, will be the go to for offline raiders.