Thanks all in advance
David
/gmroll d20+?{Modifier} will create a roll only you can see like /roll, and will ask you for a modifier to the d20 roll
/gmroll d20+@{selected|WIS_MOD} will do the above, but will use the "WIS_MOD" attribute of whatever token you have selected
/w gm Char 1: [[d20+?{Char 1 Mod}]], Char 2: [[d20+?{Char 2 Mod}]], etc... will work like the first gmroll above, but you'll do multiple characters at once. Instead of the full roll display, you'll have the final result in yellow boxes, and you can hover over the box to see the full result.
/w gm Char 1: [[d20+@{Char 1's Name|WIS_MOD}]], Char 2: [[d20+@{Char 2's Name|WIS_MOD}]], etc... will work like the second gmroll above, but it will do multiple characters at once, rather than having you select the character's token.
The second gmroll and the second whisper above are assuming all of the characters have an attribute called "WIS_MOD", of course. The second whisper can be customized if the character have the same information on their sheet but called something different.