Wall - one point wonder, or worth investing?

[Holywhippet]

Like any skills/spells/troop choices it all comes down to tactics and your situation. Often the enemy can punch through your wall in 1-2 hits but sometimes it buys you just a little more time to pound them at range. Although it might be hard to manage, the best time to use wall can be at the very start of a fight. Many slow enemies have a run skill letting them most of the way across the screen in the first round. Drop a wall in front of them and they either have to take a longer route or waste time breaking it down. Notably the trap spell has a similar use.