The rftools shield generator is unusable in 1.4 due to the energy config change.
rftools.cfg

    # RF per tick that the shield block can receive [range: 0 ~ 2147483647, default: 5000]    
    I:shieldRFPerTick=5000


    # Base amount of RF/tick for every 10 blocks in the shield (while active) [range: 0 ~ 2147483647, default: 8]
    I:shieldRfBase=8000

This makes the base rf requirements of even a 3 block shield greater than the energy input limit of the machine, even when 100% infused. There's also no notification in game of the energy requirement change. Being more expensive to operate is one thing, but this is frustrating. It would be better to just disable the recipe.