yeah its shitty and lets be honest, anybody who finds themselves in that scenario in pvp is already dead, especially if you use an attack move with long cool down instead of defences
but its a very unlikely scenario in the first place, you have to be pretty bad to get boxed in by players like that
problem is it deals 50% of attack damage to first target, and then deals that damage * 0.25 and so on to each next target, in other words deals 25% damage of previous attack to the next target.
I thought it was dealing 89% to first, 69% to middle, and then finished the enemy off with another 89.
Early world exploit: Put your hearthfire inside a cave, then hold shift to position a claim right in front of a cave. After 8 hours the claim will be unbreakable. Since your hearthfire is inside the cave, you can still get back inside, and leave, but nobody will be able to enter, effectively making you unraidable for the first 3-7 days. Enjoy