as most already know shields are quite powerfull even overpowered in some cases,what annoys me the most is that unlike weapons/spells shields parring tactic is useless beyond lv 101 so mi suggestion is make parring usefull, intead of giving high lv shields a fixed amount of def why not making their def = parring tactic x shield mod
some random examples could be:
neverpirce 0.17 mod / with 100tt= 17 def / with 200tt=34 def
dragon roar 0.18 mod / with 100tt= 18 def / with 200tt=36 def
dragonsslayer: 0.19 mod / with 100tt= 19 def / with 200tt=38 def
d1 : 0.2 mod / with 100tt= 20 def / with 200tt=40 def
d2 : 0.25 mod / with 100tt= 25 def / with 200tt=50 def
d3 : 0.3 mod / with 100tt= 30 def / with 200tt=60 def