Characters\Heroes\Academy\Nathir\ file Wizard-arena-move.xdb
in it, find the line and replace it with

with Razzak, it's more complicated - he has no effects, so he uses the vanilla set of wizard animations (they are not in the mod)
solution option 2

the first is simple, but it may cause a bug if the LOD animation is not suitable for the combat model, but it's worth a try

folder \Characters\Heroes\Academy\Razzak\ file Wizard.(Character).xdb
there are lines
    ArenaAnimSet href="/Characters/Heroes/Wizard-arena.xdb#xpointer(/AnimSet)"/>
    AdvMapAnimSet href="/Characters/Heroes/Wizard-arena.xdb#xpointer(/AnimSet)"/>
as you can see, one line is responsible for animations in the arena, and the second - for the map, the hero only runs around the map, so you need to replace the second line with
    AdvMapAnimSet href="/Characters/Heroes/Wizard_LOD-adv.xdb#xpointer(/AnimSet)"/>

in the vanilla game, different models are used for the map and the arena, but here there is only one, so there is a chance that the model and animations will not fit each other, it is easy to notice this - the magic wands may fly away, or the hero may stand in a T-pose, then you will have to roll back the changes and do the following

in data.pak in the folder \Characters\Heroes, find the file Wizard-arena-move.xdb - do the same with it as with the similar file for Nathir, save it somewhere, and put it in the mod in the folder \Characters\Heroes