With trio duku dead, what is the point of not allowing AoE skills on skill macro? Trio duku will stay dead with nerfed spawn rate/location anyway.
this change was made to combat multi mage meta in general, not just duku. for the health of the game, this change was and still is necessary imo.
To be honest I do not find there is a problem with respect to the macro, you can still do 130m / h doing leech in petri or even 1b / day if you are hardcore. I very much agree about this change, it was necessary since it fights the meta of the mages in the game.
The fact that there are people still using multiple mages simultaneously to farm tells us that even with this restriction in place, the method is still worth the trouble (quite lucrative.) I believe it is a necessary restriction.