So far best strategy for me is adding just one slime block, don't add a short king (that killed me). Adding pieces is bad nearly in every scenario as it amplifies risk. Maybe other versions are possible removing everything and then adding short kings I do not understand what effects that would have. It is a great idea but feels faulty as concept in execution a bit because you share the same pieces as the enemy.
I do not want to give my enemy the option to heal or one shot me or to give me strikes.