Several changes.

This depends not on the creature level, but on the building level

Academy buildings are located in \GameMechanics\TownBuildingSharedStats\Academy

for example, the Mage Tower

<?xml version="1.0" encoding="UTF-8"?>
<TownBuildingSharedStats ObjectRecordID="1000133">
    <NameFileRef href="/Text/Game/TownBuildings/Academy/Dwelling_4/Name.txt"/>
    <DescriptionFileRef href="/Text/Game/TownBuildings/Academy/Dwelling_4/Description.txt"/>
    <Type>TB_DWELLING_4</Type> - this is responsible for the position in the recruitment list, as well as in the building queue
    <Upgrade>BLD_UPG_1</Upgrade>
    <Cost>
        <Wood>0</Wood>
        <Ore>10</Ore>
        <Mercury>0</Mercury>
        <Crystal>0</Crystal>
        <Sulfur>10</Sulfur>
        <Gem>5</Gem>
        <Gold>2200</Gold>
    </Cost>
    <ModObjectName>MageTower</ModObjectName>
    <dependencies/>
    <Creature>CREATURE_MAGI</Creature>
    <DevLevelNeeded>6</DevLevelNeeded>
    <UIObjectName>Dwelling_4</UIObjectName>
    <UIStackPosition>0</UIStackPosition>
    <Icon href="/UI/TownHall/academy/128/d5.xdb#xpointer(/Texture)"/>
</TownBuildingSharedStats>

that is, you need to rewrite this line for both Mage Huts and both Genie Huts

then you need to configure their placement in the recruitment window

\UI\TownBuildNew\Towns
file academy.(TownBuildDefinition).xdb

look for 2 lines of TB_DWELLING_4 and 2 lines of TB_DWELLING_5 there, rewrite them