Scenario Editor - Spawning a Large Army with Triggers

So here's something I haven't found a specific solve for:

I'm trying to recreate the battle of Minas Tirith, and a trigger to spawn 60 paladins for the Rohirim. Question is, what's the quickest way to do that? I can set a condition effect to create an object, but it seems like I can only spawn one unit for one space (understandable), but then that leaves me with no choices but to create like 60 effects individually with different locations each. Is there a quicker way to down this?

I'd also like to spawn an invincible army of the dead (thinking like 40 invincible jaguar warriors), and would prefer to not have to individually do the invicibility command 40 times lol