I agree with everything you wrote except..

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Also non faiure sets seem to be optimal for shocking methods, if you were to go to failure and then drop the weight you would need to drop it a lot to be able to keep going. By not training to failure before that drop endurance will be much better.

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IMO certain shock methods like dropsets/supersets are only useful for hypertophy - so it would be better to leave your failure training to this type of work and put most of your non-failure training on heavier straight set work.