Flying tonka.
Welcome to the land of "you don't know crap until you have been given a UK CAA frontal labotomy".
I posted an earlier topic regarding some of the useless information required by the ATPL(H) syllabus and most agreed. I am not a permanent part of the UK helicopter scene anymore these days but wanted to ask the question of how the industry allowed these absolutely ridiculous requirements to be implemented by the CAA.
Sorry for ranting on. The answer to your question is - THERE ARE NO SHORTCUTS!!! All 13 exams for the ATPL(H) PLUS an IR and all must be done within 3 years otherwise you turn into a pumpkin (could be 5 years - can't quite remember).
You will also have to find out how much flying training you need to do to attempt the flight test. This will be assessed by the head of flying training at a flying school.
Sorry for the doom and gloom.