I used to kill Crystal Archers with my "bychki" (presumably a specific unit or tactic) when things were tough, and since they are Tier 3 units, you can save around 20 of them and use 3 "lokhi" (presumably another unit or tactic) to help, even if you don't kill them all, you can leave fewer. Kostya simply shared an observation, but you're rejecting it and criticizing it for some reason.
P.S. If you use your imagination, you can take Tacticians or a couple of larger units to draw aggro and prevent them from targeting your ranged units.