"On CCR I am using 1.3 for the whole dive at the moment but deco is NOT cleen so I am working on a few diferent aproaches to sort this problem out. "
If your deco is not clean then it's time to try whacking the O2 up high on 6m deco, why not try doing the working ( or bottom time) part of the dive on 1.0 bar and then whack it up, for the 1.0 bar O2 you really won't rack up much extra deco on top of what you would at 1.3. This keeps CNS loading down then you can go on high O2 for long periods at 6m, it sounds like you need a good O2 flush round the bags at 6m then stay at 1.6 for entire deco. If you're really brave you could hammer it up higher but then I'd never recommend such a dangerous practice.
Don't bother with air breaks, disco dancing heats you up
Seriously, try this and I'll bet you'll get out cleaner and less fatigued. Also, keep He in deco mix, flushing with air and other stupid practices will get you bent/ sub clinical.
OR..you could try heliox.