thanks for the long answer! I understand cltv delta, but still don't get why you'd want less htlc through your node. How they 'll increase the chance of force close?
Discussion
More htlcs and more is the probability of force closures because you never know which one would get stuck. Generally nodes with less activity experience much less force closures.
You also should probably assess your peers, if you know a peer is going offline frequently you should probably cut them.