With the new items (and new variations) being released, Heimer could use some attention.
Not really Heimer, but his turrets. With the new banner of command and Zz'rot's portal being great pickups for him, (Please don't come in here saying Banner no longer buffs his turrets, because it still has other uses) I think it's finally appropriate for a change most Heimer players have been wanting for ages. And that is, for Heimer's turrets to gain a % of his BONUS defenses. This could include health as well, but since they already have their own health scaling it might be a little overboard. This makes a more tank focused Heimer completely viable and opens up a lot more different build paths than just pure AP.