If beguile could stack and be for ranged and melee units that would be a workaround, I guess. But I had a double beguile yesterday in 0.85.
With the brood archers now in the game, the spiders could do a web wall, protecting their ranged units for a few rounds with a sticky wall that lasts for 5 rounds, or you have to hit it with two melee units that are then stuck for two rounds to open it for other troops.
It will only last 2 rounds if you set fire to it with a burning hands, fire staff, or burning axe. That would be cool.