No.
Example:
A +11 T10 full Velcoffer Plate set grants you 20888 pdef.
A +11 T10 Velcoffer Shield grants you 11827 pdef.
That’s 56,62% of the pdef a full plate set of the same level grants you.
What is true is that it gives more than the difference in pdef between cloth/leather and plate set.
But that doesn’t mean it’s OP. Legendary plate still grants you -15% physical damage after all via armor mastery.
In my opinion, based on the ingame mechanics, shields are well-adjusted to make an actual difference.
2handed-weapons still have an attack advantage while shield provids a defensive advantage ( physical defense + block), and I like having both so I can adjust regarding the situation.
If I need more damage I use my two-handed weapon, If I need more defense I use my shield & one-handed weapon.
It’s as simple as that. If you can’t afford both you have to make a choice, same with how you choose between different Classes that can provide protection,support or damage.
then why not suggest to alter/delete the rod attribute?
Instead you want some OP Staff attribute to get more freebies for less investment.
You fail to see like everyone else that Rod +shield needs more investment than Staff when you list your “advantages” which seemingly are unfair. Go and spend all these weapons/shields for ichors, Velco spirit fragments, enchant jewels, premium awakening stones and extra silvers for upgrading, not to mention extra partis solutions and see how much it’s actually worth in comparison.
Unless you’re some Blue Whale that can buy all level 9 gem abrasives on market without a sweat the combo of Rod and Shield will also have its downsides by requiring a lot more investment to reach that level of advantage.
In theory Rod+shield is all good and OP but in reality you will have to suffer greatly to achieve all these extra advantages, especially after we had the easy option of trading a T10 Velcoffer shield for a T10 two-handed weapon at the start of Re:build.
Have fun trying to get your +21 Rod and +11 shield just to beat a +11 Staff.
I’m running a full cloth set and I can say that you don’t really need a plate set if you actively evade attacks,especially as a Wizard who has permanent damage reduction of over 20% via Magic Shield.
I can do my demon lord hunts and Velcoffers without using a shield or plate armor.