Just curious, i mostly use reset when i’m within 145 dg level range since the succeeding levels don’t have decent grinding areas/dungeon until dg 190 and alemeth.
are there better ways to make the most out of resets?
where do you use yours? for boss rush? for saalus? (saalus has a separate daily limit right?)
Was going to say, I usually use them when doing my solo 200 rushes. shrug
how many cubes does it give? and are there other rare loots aside from manamana?
All the Catacombs stuff. 1 Cube.
I would wait to this event, it will give 50% extra exp and also one extra cube drop. Also, there are some instances where there are more than one boss who drops a cube, like archmage tower dungeon. Furthermore, i think the cubes of this dungeon gives the best drop of all dungeons . I would recommend to go there in the event period to optimize the reset voucher 
but that’s an ET event. you have to have a character for ET
true,… i hadn’t read that :S