well I decided my Titans return decepticons needed their leader so what I did was get an energon scorponok, perfect effect pes-02 deathstalker and the head robots green king upgrade kit. Overall thoughts are that deathstalker is a great little headmaster, plus I love that the body he comes with can transform. The green king kit however is a mixed bag. First of all it was over priced and I knew that going into it. The claws are great and really do a lot to change the way the figure looks. The headmaster adapter though really sucks. I applaud their attempt to add neck articulation, but there's nothing holding the two pieces of the neck together, I may end up getting one of the neck adapters from shapeways instead. I was also surprised how well the colors of both kits work with the energon version, especially since greenling is meant to go with the botcon version
