Idea - split Guinsoo's Rageblade into 2 items
The basic idea is to split current Rageblade into 2 items Item that benefits hybrid champions and item that benefits onhit effects / basic attacks only
Phantom's Razor is item that is made specifically for onhit effects that benefits basic attacks only and it scales with attack speed so the more attack speed you have the more damage you do with your basic attacks only. Since this item does not grands any AD or AP it will not boosts your abilities that scales with AD or AP.
Rageblade is preserved as hybrid item that scales in a hybrid way. It not only benefits your basic attacks but also grands AP and AD therefor it scales your abilities as well, while also grands some additional damage to your basic attacks.
Phantom's Razor 50% attack speed unique: each basic attack grands phantom stack (2 for melee) for 3 sec (6 sec for melee) which stacks up to 6 times. Each stack increase your attack speed by 5% and each stack does 4 (+5% of your bonus attack speed) as magic damage on hit. At max stacks you get Phantom Hit: every other basic attack applies onhit twice
Guinsoo's Rageblade 25 Attack Damage, Ability Power and Attack Speed unique: your basic attacks does 15% AD + 10% AP + 20% AS as bonus magic damage on hit Guinsoo's Rage: each basic attack and casted ability grands 4% Attack Damage, Ability Power and Attack Speed up to 8 stacks for 6 seconds