How useful is upgrading the inferno tower?

I just went for the new stuff then the cheapest upgrades.

Both of my infernos are level 2. Level 3 is tempting, but I won't bother since I am anticipating a nerf to infernos in the next update...

OP, work on your wizard towers or teslas IMO.

I am taking both of mine from from level 0 to level 3. I want to get them done with in case I want to do a push in the next month or so. What I cant decide is if I should have a builder on a wizard tower or my new x-bow which is lvl 1...

Got one up to level 3 and the other will hit level 3 in five days,looks impressive when it has those five tentacles coming out.Can't wait for that other one hopefully no more mass hog raids.

Upgrade Mortar then Wiz Tower then Inferno Tower
In the order of those 3 defences.

visibly