what's the ideal block size to get good stake,
suppose start with 20k coins?
all in big block or split into small , any idea
The stake rate is the same regardless of whether you have them in one address or multiple addresses. Two addresses with 10K would earn the same as one address of 20K so I would keep them in one address for simplicity.
If you want a chance to win a lucky block, you need to have over 50,000 in one address for a 5K lucky stake, 100,000 in one address for a 15K lucky stake, or 300,000 in one address for a 60,000 lucky stake. Believe the current lucky block stake rate is 5% (you have a 5% chance of getting one each time that address stakes).
From the topic (page one) regarding lucky stakes:
If you have more than 50 000 coins you have a chance to win 5000 coins.
If you have more than 100 000 coins you have a chance to win 15 000 coins.
If you have more than 300 000 coins you have a chance to win 60 000 coins.