I'm flattered that you ask me, but I don't feel qualified to give you the crisp answers you seek. I don't think the order of speed or tempo runs matters so much, so long as there is sufficient recovery after your work days.
Lest I be accused a cultist, I will point you to 3 different authorities, that I have read and liked: Greg McMillan, Jack Daniels, and Lydiard.
For developing speed, McMillan (see
http://www.mcmillanrunning.com/training1.htm
) describes optimal training paces for "Speed Training" and for "Sprint Training". (Be forewarned, he does use the term "Lactic Acid", but the right physiological adaptations and related improvements should come just the same.)
The "Speed Training", or "Aerobic Capacity Intervals", is between 400m and 2000m, at 3K-8K race pace. Recoveries are about half the distance, or about the same time as the interval.
The "Sprint Training", or "Anaerobic Capacity Intervals", is shorter, betweem 100m and 400m, at mile race pace, with longer recoveries of twice to five times the duration.
Daniels recommends something very similiar, but calls them "VO2max Intervals", and "Repetitions". He gives tables with the right paces, as well as a structured 4-phase approach to training, which can be adapted from 6-24 weeks (or more).
As far as I can tell, Lydiard (see
http://www.lydiardfoundation.org/
for practical details) doesn't make a clear distinction between these two, but calls the interval work "Repetitions". The speed development starts with his "Hill" phase, followed by "Track Training", and then a "Sharpening" phase. I like to think of Lydiard's hill training more like weight training for the legs. The "Hill phase" is not just including lots of hills in your regular runs, but specialized circuits of slow springing, bounding, or steep hill running, combined with recoveries and fast leg speed running, as well as fast downhill running for lengthening your strides. The "Track training" is more conventional and the speed work is comprised of "Repetitions", and race distance related "Time Trials". The "Sharpening" brings everything together, putting the finishing touches on your training in preparation for your racing.