my coin control
(time - 14:43)
Notice that the blocks with 14 coins vs. those with 28 coins.
The 14 coin blocks are at med-high priority even at 90 confirms.
The 28 coin blocks are at high priority at 53 confirms.
This tells you that, as soon as you stake, you should combine the smaller
blocks to have a chance to stake sooner. It does not guarantee that
a given 28 coin block will stake sooner that a 14 coin block but the odds
are better. Faster staking = more coins over the long run.
Looking at the time stamps of the 14 coin blocks, you could have combined
them in to a couple of blocks. You would not want to put them into 1 block
because, if you were unlucky, you could be waiting a long time for a stake.
It is a matter of finding a balance of size and # of blocks.