Cloning in coco is piss easy dude. take clones as you should. I use fresh coco without doing anything to it. I fill a small pot, Christ knows what they are but small, about 6cm across and 10 high. So fill it a 3rd full and spray with clean phd water to moisten it, add another 3rd, moisten again, repeat. Pot is full. I make a small hole, spray a little more water and stick your clone in(after dipping in clonex) pop your pot in your propagator , do the next pot, repeat until you have as any as you want. Pop the lid on propagator, mist lightly. then mist a few times a day for the first few days and reduce misting. You will know when they are rooted because the lowest leaves will start to yellow or if your brave you can just pull them gently. That's all I ever did in coco. These days I just slap perlite in a seedling cell tray, stick a cm of water in the bottom and forget about em. Don't even have to mist em or use a dome. Either way Bam 98-100% success rate.
I must point out my climate is neither very cold nor very hot so I don't have to worry about heat mats. That may differ from one environment to the next.
GL cloning, you wont need it!