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.

[Newbie1234]

Wall is great in certain situations.

From my experiences, the AI tends to just avoid the wall and really only attacks it as a last last last resort. I have a couple of points invested in it, and it's something like 1800 health and 30 defense, which has been more than enough so far. You don't want too little health, or else multiple hex attacks (eg. Phoenix, Cerberus, etc.) might kill it accidentally.