Used something similar cast random sequence I ended up doing some research and found a really good spell rotation 969696 thing
founnd the info at

http://maintankadin.failsafedesign.c...&highlight=969

this assume yer pulling with cap'n america style :P
and starting off with a seal

/castsequence reset=combat Holy Shield, Hammer of the Righteous, Judgement of Light,,Consecration, Hammer of the Righteous, Holy Shield,,Judgement of Light, Hammer of the Righteous, Consecration,

once yeh get shield of righteousness add it between the 2 commas and at the end

so far this has worked great for me