Which items should be gone forever?

According to Fiel's calculator, you would need 12184 defence to reduce skelagon damage to 1 (def gets divided by 4 before its subtracted). I don't understand how that is possible, even if you had 2000 str and 200% potential, it wouldn't be half enough.

Shield Mastery is a 200% wdef buff, dropping that to 4060 def. A decently equipped (HTP + CZak + Shield) Paladin has 900+ wdef, lowering it to 3250 def or so. Dex/luk/int add about 0.4-0.5 wdef each, so if you have 60 of 2 and 120 of the other, that's another 100 def. 3150 def from str is only 2625 str, which is pretty reasonable...

I have no idea where %wdef fits into this post-BB, but if it applies after base stats and stuff are added up, and they have 40% or so, then 4060 def drops to 2900, 2000 without gear, 1900 without secondary stats, for about 1600 total str.

40% def 60%~ str is not that hard to get to. 140% str to do it on str alone might be expensive.