Now that Kog can't abuse every single item here are some ideas for Wit's End, Botrk, and Rageblade

Wit's End Builds out of: Cost: 2728g (42g) Stats: -65 Magic Resist -50% Attack Speed Passive: Basic attacks grant 5 on hit magic damage stacking up to 6 times for a total of 30 on hit magic damage. Active: At max stacks Wit's End may be activated. When activated, the user sacrifices 42% of their total magic resistance and converts it into attack speed which scales based on how much magic resistance was sacrificed. The effect lasts for 8 seconds and after the effect is over the attack speed is lost and the magic resistance is regained.

Magic Resist and Attack Speed both buffed. Magic Resist steal is removed and is replaced with an active on the item. On hit magic damage lowered and now is on a stacking system. Now has a unique active that lowers the users MR but gives them attack speed in return. This makes it so the item doesn't turn into too much of a stat stick and to get full benefit out of it you have to sacrifice some durability.

This is also can't be abused by tanks like Titanic Hydra can when it's strong because tanks can't make very good use of attack speed and lowering their MR is risky because they are supposed to be the ones soaking up damage instead of doing it which gears this towards bruisers. I think it's a pretty interesting thing to add into the game to allow for more interesting plays and decision making.

Blade of the Ruined King Cost lowered to 3200g from 3400g Passive damage increased to 7% of targets current health

Right now Botrk is pretty trash and only a few champions buy it. Too pricey for what it gives and the passive nerf really hurt it so just a few small buffs to make it a little bit of a better buy.

Guinsoo's Rageblade Builds out of: Cost: 3200g (475g) Stats: -30 AD -45 AP Passive: Basic attacks deal 15 on hit magic damage. Basic attacks grant +6% attack speed, 3 AD, and 3 AP for 5 seconds stacking up to 8 times (2 stacks per auto attack for melee champions and 1 stack for ranged). At max stats gain Guinsoo's Rage. Guinsoo's Rage: Basic attacks deal 20(+20% Bonus AD)(+15%AP) on hit magic damage to the target as well as nearby targets. This effect lasts for 6 seconds and refreshes on basic attacks

Similar to the old rageblade but the power has been shifted into Guinsoo's Rage over pure stats. The stats the item gives upon purchase have been lowered. The stats gained from the stacking passive have been nerfed compared to old rageblade (48% attack speed down from 64%, AD remains the same, and 24 AP down from 32 AP). Guinsoo's Rage has been buffed to 20% bonus AD up from 15% bonus AD and 10% AP up from 7.5% AP. This means that just buying the item won't give you a huge spike like old rageblade used to and is more focused on getting that sweet bonus effect at 8 stacks.

The cost is 400 more gold than old rageblade so you have to invest more time into the power spike. Making it 8 stacks again but giving melee champions 2 stacks per auto attack gives them an advantage over ranged champions who buy the item so there is less abuse from ranged champions who buy it. Much more balanced than old rageblade and is actually good and is much easier to balance than the current iteration of rageblade.

Ideas are always welcome. Thoughts?