Lich Bane; Item Buff Suggestion, (but a nerf for the exploiters)

Ode to Runeglaive... Anyways, the suggestion is basically make Lich Bane convert the user's base attack damage to magic damage instead of dealing physical damage and then lower the AP ratio to 40% from 50% (the base damage removed too, and replaced with 100% base attack damage as magic damage). This is a small nerf to champions like Twisted Fate and Viktor who exploit the item the most since they already convert their attacks to magic damage, and a buff to other users that can use the magic damage conversion.

The damage is basically this... 100%base AD as magic; 100% bonus AD as physical; an additional 100% base AD as magic; an additional 40% AP as magic... for the basic attack proc [Sheen is 100% base AD as physical; 100% bonus AD as physical; an additional 100% base AD as physical (i need to state this because a lot of you would think I added some absurd damage to Lich Bane since most of you do not know how basic attacks work for some reason...)]