I have extremely limited space between the pump and the side of my case so would it be viable to have low profile non rotary angle fittings directly attached to the pump and stack rotary fittings directly on to those to counter the anticlockwise twist to the hose?
i don't know, i ordered these http://www.watercoolinguk.co.uk/p/Bitspower-angle-14-inch-to-Female-14-inch-Deluxe-White_36950.html because they were the shortest i could find. im all for having proper rotary angles but they look so tall and i can't find any pages that list the full dimensions of the various fittings, the only dimension i ever seem to find is the height and size of the thread. normal rotary angle fittings always look so tall to me but if i could be sure they'd fit i'd buy them instead...
You can normally achieve around 1/2 to 3/4 of a turn extra just after the fitting actually seals on whatever its screwed into. Normally you don't need to tighten a fitting too far for it to seal correctly. However if you need the fitting to line up correctly then you can tighten it further to achieve an extra 1/2 turn or so.
You can see in my rig below how I have used non rotary fittings to assemble a T section for my reservoirs. While I used different angle fittings as you have purchased, the principal is the same.