[Aethelia]

When you see him jumping forward, dash about 2 times in the direction he's going then immediatly AAS the rock, but don't get too close or else the impact from the smash will kill you. What I usually do for him, is use SoS (this works as a voke, so don't use it on him, use it about a dash length away from him) then dash behind him, str buff and aeh buff, then wait for him to jump. The second he jumps use rb orgel then rb sound of agony or a good 8-9 hits or so with air combo damage.

Also another fun fact about B3, the Lavas (not the big ones), Mudmen, and Efreets can take serious damage when you use a stun skill on them. So try and save rb rhas and normal rhas for them.