One more thing machina, you use singularity and gravity well before the 2 second buff. Just in time so they activate during the 2nd buff. Then you can use stomp and back breaker during the 2nd buff. If you are running on mobs most of then would be close to or have been defeated by now. Then you can use your extra skills: hammer & slam to finish them off. Either you use gravity well with the 2 second KR buff combo, or use this alternation: gravity well, slam, stomp, then back breaker. I vary my skills depending on which is available. Then since breaker will most like be the first to recover, and you still have singularity available since it wasnt used in the gravity, slam, stomp, breaker combo you can click on singularity by the time back breaker is about 60% on it's cooldown and you will be just in time to use back breaker combo.