On its own, Isshin doesn't do anything since there are no combat triggers going off
Once again, going off artwork, game design, and knowledge of mechanics alone, Im hoping Emet is an Orzhov or Mardu creature with the ability to bring allies back from the graveyard or banish allies and then play them
Enchantments - 10
Nils, Discipline Enforcer Nils, Discipline Enforcer has a built-in Sphere of Safety that counts the counters on your opponents creatures, plus a free +1/+1 counter for each player on each of your end steps
Lifegain Matters Since Aragorn has lifelink, we might consider cards that take advantage of that burst of life from combat damage
The last option is to not bring in Disenchant, which was a pretty bad idea, but ever since Councils Judgment became a thing this might actually be the best way to handle this disequilibrium