Refer to my post
https://forum.lowyat.net/index.php?showtopi...post&p=67020411 
Mostly it's because we have proper teams doing it under 20-25 seconds. So if your group can't do that and take longer, or if you don't consistently do it long enough, then you don't get much result right ?
I set my personal target daily at lv 10. Anything else is just extra.
Maybe for you maybe try aim 5 levels first ?
Honestly my dps isn't good enough to solo cota because i don't do enough damage to clear cota fast enough, so that is why i instead make parties with people who have high dps. So most of my own contribution besides my paltry damage is to kite creeps to make it easier for the wizards to nuke them. also i got mobility to scout which routes to take, so the team follows behind me after they cleared the whites.
I found the Skorn i bought with 5+% to keep me alive to do cota. But now that auction house is gone, and there is very few days remaining until ros, this is probably no longer an option for you to pursue :/ (i'm assuming your main is a barb ? )
also when you clear as fast as my group, its better to be in group for more bonus exp. The only reason to solo is if you can't find a group or form a good one.

These aren't the botters you are looking for

that guy has way more time on his hands. He got them paypal donations to support his life style

how to fight that. Also mentally i'm not like him, can do cota months on end.... i only spent 1 week okay from 100 para to 400 +, then i stopping (500). Big difference from people like kong .... their on a whole new level of obsession

I like D3, just not that much

anyway my game plan is, 500 para for the para skill points 50/50 that i need. with the attack speed nerfs, and the lack of other stats on my gear, i needed these paragorn skill points to get the attributes to fill in the gaps for my gear X_X: that is the only reason i bothered doing paragorn.
After that i'll just casually farm gear when i'm free, and maybe do an achievement at a time for 100%
cauz cota is not fun, it's just a means to an end while there is the community event bonus.