DiscusFish is probably the largest pool merge mining I0Coin
https://www.f2pool.com/
Last payout to me with 1.2-1.4th/s in a 24hr period is about 0.01236844 I0C
EDIT: Current DiscusFish pool hashrate is 69.7 Phash/s.
Yes, looks like you're right. I haven't checked the hash rates recently. Ghash.io has really dropped their hash rate. Wonder what's going on with them.
Discus Fish just starting mining i0coin this month according to their bitcointalk thread.
https://bitcointalk.org/index.php?topic=700411.msg11358215#msg11358215