Actually, Neheb did nothing wrong and does die to removal. Also he's like the only other 4-drop creature in red. So let's replace experimental frenzy and put him back in his rightful spot. I feel like Experimental Frenzy can be a drafting trap because there's no way to churn out of 2 lands in a row I don't think. Sorry Neheb.
The God-Eternals don't die to removal, even exile removal. Oketra is insane in a limited setting, providing so much stats with the simple casting of creatures. Let's replace them with the Primordials cycle from Gatecrash for some fun splashy topend for each color.
These creatures still have powerful, impactful effects, but they actually die to removal.