You still haven't looked at my combo guide? There are 2 problems with your setup, first your setup doesn't take advantage of height damage bonus, second, medusa scale off str instead of int.
I'll give you credit where it's due, your original post was why I went back and played through the game with an elementalist but since I like character interaction I will never pick Lonewolf.
There are a ton of things wrong with my setup; I am not using time skip, I am not scumming gear to maximize my damage, I am not using barrels, I am not scumming for perfect skills, no mines, nothing.
I'm keeping this as simple as possible with as few external modifiers as possible which means no high ground, no prebuffs outside of Medusa.
Also, yes I realize it scales off of strength but the radius for Medusa is just as big as Ignite's radius and it's guaranteed CC - yes, you could use ANYTHING and I mentioned that earlier, if you're left with 2AP you can pretty much use any guaranteed CC that you want be it Dominate Mind, Terrify, Medusa, Charm grenade.
In this case, Medusa was enough to strip off the last bit of armor and provide CC. Simple as that.
And finally, you're using a lonewolf combo, and I am using a glass cannon. So my damage is NOWHERE near that - look at Impalement, I might get 150 even with high ground bonus? Notice that my Impalement is hitting for not even half of yours. So your set up really doesn't make sense for this, you need extra damage from somewhere and the next biggest thing is Nova.