is there any blog on how to stake in novaexchange ?
You can't stake on an exchange what the hell? Just buy some and put them into your wallet. You will need a few 100 thousand coins to begin staking well.
Say one is better than 100k for 1 address or 10 for 10k for addresses?
It's better 100k for a stack in an address. Keep combine whenever you get the reward and coins get split in 2 stacks until you get at least 500k coin stack.