Difficulty is high man, i'm renting 80 mh/s and it's about 6k coins a day, try renting at least 40-50 mh/s
How do you know it's high? Where do you see this?
In the client and ya, that explains it. Its SCRYPT so ASICs are going to murder your CPU mining, even GPU. If you go into the debug console of the wallet and type getinfo you will see difficulty. Diff has been in the 50-100 range lately so you can get a few decent payouts with about 50-100 MHs rigs but yea, SCRYPT got rented a ton these last few days.
Pool 2 is now the largest outside of the PoS blocks so you are slowly accumulating. Best bet is to rent a miner, do the same address and you will start getting paid when those blocks mature.