or maybe make it too powerful... but the idea is this:
Make a skill that allows people make small traps, like extra sharp sticks, or something, that can be thrown on ground from inventory, and be visible only to you for 1 min, and after that either disarm ( wind scatters the sharp sticks?) or make it invisible to all, but still effective (This would be bad BAD idea).
How this is going to help archers? well, the traps effect everything that steps on those... even those that lay the traps down, so no melee char is going to use those... as a fighter that just stands their grounds seems quite suspicious... while archer can just keep firing those attacks, and maybe run away... while the opponent most likely follows in straight line.
The trap effects could be damaging opponent (this sounds most reasonable effect to me), damaging their equipments (shoes mostly, which would make people want use higher quality shoes other than glogs to defend against losing shoes to traps) or the third effect could be draining stamina, making person hungry suddenly ( heath magic? well, this effect would make archers bit overpowered, i think), or immobilize person for 2 second ( isnt that something like 1 arrow, or long time to run away?)
So... does my idea sound reasonable, or rambling of insane hobo? And do i have some mistakes in my logic