Best level 6 unit.

For example, if you have two Dungeons and two Towers, the question is whether to take a Scorpius or a Naga. This is where the pros and cons are considered.

Both the Manticore and the Naga. Let trolls and golems sit in the garrison and accumulate.

you can also consider them as creatures joining your army))
let's say you have one free slot, who will you take? ))

Probably, it was meant that there are no free slots and you need to kick someone out? Then I would compare the power of the joining stack with all my own and replace the weakest one with the joining one if it was better. As a result, there will probably be 2 stacks of level 6 in the army. And since I don't like bad morale in the army, and joining monsters is not a good idea, I will send these joining ones to gain experience. In this sense, Death Knights are indeed the best level 6 unit. :D