Embedded Dice Support Reviews RPG & Card Board Ignoble says...
How many monsters are we talking about?
Keep in mind that if you have similar monsters then they can use the same field. For instance:
6 Skeletons D20 x6 will give you a D20 roll for the 1st, 2nd, 3rd, etc.
Likewise damage will also be true.(See below Dice rolls)
Additionally, there is the "Roll FULL Range D2-D100:" have you tried that?
If that does not solve the problem then please detail an example of what you need.
First skeleton rolled 4 attack and 5 damage
Second skeleton rolled 18 attack and 6 damage....