Allies only. This includes Summons.
Neither. I used to be Pro-Zombify with it being at 15 for getting the max use out of Damballa, but it’s unnecessary unless your intention is a Support-Summoner build that has the ability to keep all of them alive. This would require Priest C2 minimum, and once you hit Post-Lvl220 3-star maps, it’s going to be very difficult to keep 19 Zombies up. Damballa triggers 15 times or 18 times with the Damballa Gem, Zombies have a chance of respawning with full health after dying from Damballa (Without the Attribute), so it doesn’t need full investment in your case.
Wheelchair Zombie adds 5 seconds to the cooldown of Zombify and you’ll only have the Large Zombie Attribute enabled when you’re ready to make one, so if you want to always have it available to you, leave Zombify at 11. You’ll have 15 Zombies Max under normal circumstances, and you’ll be able to pull off most/all of Zombify’s explosions at once with it.
Sure, if you can get lucky enough to summon Zombies to use it. That’s a big If. Spectating 5v5 Arena in kToS, I’ve only seen Zombies summoned by a Bokor once there. Off of traps. It’s really not such a rare opportunity, it’s just that they don’t even attempt it. Which is such a shame, because if you have a good computer, summoning 15 Zombies off of an Archers Caltrops can potentially drop your opponents FPS down by 10-15 and you gain the option to hit an enemy for 3k-45k and knock them back at the same time. Well, regardless of the difficulties, I’ll be giving it a go once I hit Bokor C3 here because ping prevented me from playing Arena over there.
Large Zombie: Tankier, AoE attack, Slower movement.
Wheelchair Zombie: Faster movement, Strike-Property attack, doesn’t pick up Tet Mamak La skull when touching it.
Preferences:
Normal Zombie: Dungeons (Damballa), when I’m lazy.
Wheelchair Zombie: Tet Mamak La spamming outside of dungeons.
Large Zombie: Enclosed-space grinding when I’m lazy.
That won’t work.