Of course, heavy use of auras can easily be the build for any of these commanders, and theres some overlap on the lists, but I look toward some broader build options here
At $19, the Celebi Amazing Rare is under-valued at the moment pick it up
due to their age, but it's still a shame to have them locked out of circulation
Anti-Venom, Horrifying Healer Attended Healer Centaur Healer Compassionate Healer Cult Healer D'Avenant Healer Daru Healer Drannith Healer Elrond, Master of Healing Elvish Healer Expedition Healer Faith Healer Femeref Healer Hallowed Healer Heal Heal the Scars Healer of the Glade Healer of the Pride Healer's Flock Healer's Hawk Healer's Headdress Healing Grace Healing Hands Healing Leaves Healing Salve Healing Technique Infirmary Healer Ioreth of the Healing House Kalastria Healer Katara, Heroic Healer Kithkin Healer Kitsune Healer Liliana, Heretical Healer Master Healer Niambi, Faithful Healer Night Nurse, Healer of Heroes Orcish Healer Orim, Samite Healer Potion of Healing Samite Healer Sun-Blessed Healer Treefolk Healer Troubled Healer
Attack Drone: To lower casualties and be more efficient, both nations have replaced their own soldiers with machines instead
After that though, you could consider a lands-matter sub-theme, playing multiple lands a turn to stack up the triggers