Thank you for your thoughts. I have a feeling that your thought around just spell-cleaving instances with tactical warlocks set up around the place to speed myself up might work quite well for me as i have no hunters leveling for pet tagging etc. Luckily i already have 4 lvl 20 warlocks.

I was most worried about leveling up 4/5 shamans to 60 and the being stuck leveling 2 paladins with no real efficient boosting mechanism. I heard lvl 70 druid thorns boosting is very effective but I do not fancy leveling a druid all the way to 70. Seems i would just be better missing the hysteria of the outlands launch and grinding my team up, learning to use them properly and setting up my abilities and toolbars the way that works best for me through trial and error