Evaluating archers.

But the combined damage of two attacks from an archer and a grand elf is still less than one attack from a fanatic or an archmage, for example... :) Double strike is just an animation; they could have fired once, and nothing would have changed...

Even if that's the case, you have to admit it looks impressive. And for their level, they are strong. Moreover, you need to consider the growth rate. How many grand elves and monks will there be after a certain time, and then you can compare. Because they won't meet right away :)
I've had all sorts of experiences: sometimes grand elves hit monks (fanatics), and sometimes the other way around.