You just discovered how a lot of ppl have been cheesing this game besides the Explodemancy.
Running a solo play right now and spider is awesome. I haven't tried the other summons because it doesn't fit the theme of this character but spider is really powerful. Goblin camp pretty much was poison a few enemies, then web a cluster and use some sort of fire (arrow, scroll or environment) to burn the web and pick them off with my crossbow easily since they were all poisoned and/or burned down to low hp.
I would possibly lower the hp of the spider at least and make the melee attack have a chance at poisoning rather than a guarantee if enemy fails their saves for it. Also shouldn't be able to go around and bite everyone to low health, combat turns only start if someone dies. Can't speak for the web attack because maybe I use it in a manner other than its intended use.
