^ riots spree on bottem
^ steal rescources at the bottem to stay in + income and you just steal their aid to their bottem chained guys
^ prop chained provinces at the bottem if they have almost no tpa anymore nice full leet army oe one hitt on that :)
^ or just ns

All of the above makes it even that harder for the enemy chained provs get a nice greed on him to
When doing the above you will be able to not let the enemy bottem really pump their defence up again and lowering their defence but all is situational.

But having 180 OPA at the bottem no defence no thieves will be onley landswap and landswap
chained human can still have 120 OPA with some thieves to use his stealth.

Not using stealth/manna to zero than you are doing something wrong at the bottem