Hi! I read your SOW, had a coffee and read it again. I am making an assumption that I know what you are asking for. How many 'templates' do you need a true Master Slide Deck for?
As you know, a carefully designed Master Slide Deck (aka template) will provide long term benefits, with a choice of layouts fully branded with your design/scheme for use in the future. You will have a Cover, title, section and thank you slide in addition to 20+ fully branded layouts for you to choose from. These layouts will be quite different from the default slides that come with a new deck and are very '2016'. Clean and crisp with plenty of options for you to insert your content into. I will apply a suitable slide transition, animation when called for.
Have a look at my Portfolio (samples of work and my Bio) and my Profile. The usual KPI are there; Completion Rate (mine is 100% -I finish jobs, so this is an important rating) Stars, Tests, Badges … but most important are the great testimonials from satisfied clients – many are related to PowerPoint and design. In Dec 2015, Freelancer.com recognized the exemplary work I do for my clients and awarded me as a Preferred Freelancer; I am very proud of that gold crest on my feed. Besides searching for work on my own, Freelancer now acts on my behalf to find discerning clients who want the best of the best.
I also do front end work - the actual Presentation. I have a large toolkit of graphics, illustrations and icons ready to be branded.