You find em just like any other offset really. Search for a monsters name that's on screen. Then check what accesses it... then you'll prolly have to select it for something to show up. Then as its a string, the first offset will be 0, which you don't need, so you'll have to add a pointer to [whatever address + 0]. Find out what accesses that and voila you'll have your offset.
I personally find the easiest way to find offsets is to locate the structure of whatever you're interested in and output all the values starting from offset 0. You can do this in for autoit using tooltips, in excel using VBA to read the memory, or C# in some nice form, etc pick your favourite. Then just have the list of values update constantly and have them in view as you do your thing in game and see what changes to values you suspect are correct for what you are looking for.