Most of the time you want a chain of blocks in a descending order of value. For example, if 1024 is your largest piece, 512 should be next in line, then 256, and so on. You can either build larger blocks by merging the entire train, or increasing just a single block of the train. <br>

You usually want your main train of blocks to be full, especially in higher order games. If not, you risk a block spawning in the corner where your largest block should be, and could thus ruin your game.<br>

Consult any further strategy from 2048 since it is identitical in implementation.