Ah, ok, thanks, I had no idea Constants wasn't compatible...
Viewing post in Aric's Expansion Rebred
No, you are fine. So long as Aric's Expansion is loaded first (lower number in mod list) there should be no problems.
The constants mod has no conflicts as Aric's Exp does not change _ready() in mainmenu.gd.
The random portrait mod adds to _on_slaveconfirm_pressed() in mainmenu.gd, which Aric's Exp overwrites. No conflicts in slave_tab.gd or constructor.gd.