Personally I'm going to learn about 6 or 7 of the poems (roughly a third). The plan is to learn My Last Dutchess (themes of human nature, abuse of power and art), Ozymandias (Time, abuse of power, art), Exposure (nature, negive view point on war), Charge of the Light Bregrade (Glory and a positive view of War), Checking Out Me History or The Emigreé (Time, history and patriotism) and possibly Tissue but I haven't decide on that (it's mostly just human nature, power, religion and fragility but these aren't major themes).
There's no point learning remains of bayonet charge as remains was the poem for last year's exam and bayonet charmge was the mock exam