Hello TiiPanix,
I have an Arctic Z1 Pro (for 1x max. 38") with an extension Arctic Z+1 Pro Gen 3 (for 1x max. 38") .
This means I can use two monitors on top of each other.
I have a 32" monitor at the bottom and a 21" monitor at the top.
The two poles of the Z1 and Z+1 then still have a 10 cm gap at the top.
But since the whole thing wobbles a bit, I wouldn't go any higher.
and therefore I would not hang any larger monitors on it.

You want to operate two 24" monitors at the bottom and a 38" monitor at the top.

This means you would need the Arctic Z2 Pro with USB 3.0 hub (max. 2x34") for the two monitors below.
Whether the extension for one monitor also fits here, or whether you then need the Arctic Z 2 Pro Kit (max. 2x34") as an extension, I cannot say.

this will not work because the bar for the arm attachment of the monitors is too short.