Drop the cluester things to save some pts on a allredy expensive unit. Cluster cost and arm and a leg, and are a waist of points if you not baldvaing evry turn, revers bladvaine fine without them.
Also consider replacing heeatlances with blasters, the longer range makes the unit more flexible, with is a plus in eny turnement.
As for troop you need troops tht support the revers, and raather then going in to a diteld explenation here, Mushkilla relly got all that coverd in his fantastic battle reports, you can find them here, happy reeding, and best of luck!
Rever hevy battle reports:
http://www.thedarkcity.net/t3946-the-black-buzzards-battle-reports-links