How to make Wit's End more widely attractive
From a guy who builds it way too often.
First, a bit of history. Wit's used to be super-cheap and it didn't shred MR. Lots of Bruisers loved it. Then it got MR shred and its price went up by no small amount. Suddenly it isn't so attractive since the range of champs who can take advantage of that MR shred is much more narrow.
So! How do we fix this? Well, I've seen three really great options.
Option the first: Remove the MR shred and give it ramping magic damage OnHit instead. Same general effect (attack more to do more damage) but now it's useful of champions who don't care about the MR shred. Yay!
Option the second: Add at least two new items to the game; sister items to Wit's End. Have one build from
+
and the other build from
. Give them passives (or actives!) that all reinforce each other in some capacity so that all three together make for a tanky force of reckoning.
Option the third: Replace the
in Wit's End with
and make it steal up to 25 armor AND magic resist. This would make it attractive to Bruisers regardless of what kind of damage they predominantly deal.

Your suggestions arnt very fitting. If you gave it AP at least champions like
etc would give it more consideration when looking for an attack speed item to boost their Magic Damage auto attacks. Though it would make it very hard to balance for the same reason.. Having all that power in 1 item is kinda nuts.
... It scares me.
then I can certainly see it's stats being improved. However, I think that insisting its effects must scale is wrong. An item can be tuned for being most effective against soft targets. That isn't a problem. There's plenty of room in the game's itemization to allow for it.