There is a feature that I always wanted to add but still impossible to do properly through UI: make visible the spells area.
The idea is this:
The image is a bit rough but should give the idea...
An area around the cursor will show the range of the spell/action that you are currently doing and the affected mobiles should also be highlighted. I've used the color blue for beneficial/neutral actions and red for the negative actions.
If the area of effect is around the player the range should be shown with the player in the middle (the same for the summon spells)
This feature will be very useful for old and new players so I hope the devs may consider it
The idea is this:

The image is a bit rough but should give the idea...
An area around the cursor will show the range of the spell/action that you are currently doing and the affected mobiles should also be highlighted. I've used the color blue for beneficial/neutral actions and red for the negative actions.
If the area of effect is around the player the range should be shown with the player in the middle (the same for the summon spells)
This feature will be very useful for old and new players so I hope the devs may consider it