Hi guys, I'm busy writing/editing manuscripts for publication based on my PhD thesis(Life Sciences student here), but my reviewers keep saying my discussions are too speculative and repetitive. However, the work I have done is quite novel and not been attempted by anyone before, so there is very little existing data to compare my work against, forcing me to make leaps in logic. Please help, I'm getting frustrated here!

Don't be frustrated, when I had a task like that, I just created a list of ideas, that I was going to use in my work, and then just placed them in the order, that they should appear in the work. Try this method, it always helps me.
Anyway, You can always use some special servises, like this one http://www.uk.essay-writing-place.com/

Good luck!

yes, use essay writing services to write a paper. Brilliant idea.

My first suggestion is getting other academics involved - this might seem like a cop-put, but it is a good way to pick up tips about academic writing.