need help

, i hv just joined my 1st pool (H2C). i hv two question. plz anybody give answer

1) all higher hashing rate of (scrypt) like 1Gh or more available in rental service need higher difficulty of 65536 or more for optimal performance. but
coin available in h2c has low difficulty. so what to do ? only option i have is to choose low hashing rate but i need high hash rate with lower difficulty.
2) can i directly put exchange wallet address in h2c pool for getting mined coin?
waiting for reply thanks
