If Vayne twoshotting Squishies isn't okay...

Then a super minion tanking two nexus turrets alone and taking one down should be unacceptable. I mean come on! The only turret greater than the nexus turret is the fountain turret which logically, should mean that the nexus turrets should be hard to destroy but highly rewarding. But right now they just feel like outer turrets. They even cost less than outer turrets. It's so annoying. You can buff them like this:

1. Give damage reduction based on how many inhib turrets are still standing
2. Bring back laser and increase the ramp up dmg to super minions (they have over 4k hp ffs!)
3. If two nexus turrets focus one target, minion or champion, let them deal true dmg based on %hp
4. If no minions are around, the turrets gain 50% dmg reduction and get a shield based on hp left.
5. Bring back turret shields that shield allies.

Now these are options. Not all should be applied. But even if one or two are, Nexus turrets will become far more intimidating than they are now. Right now they feel like they are made out of cardboard.