I know how to make dorans shield friendly for solo laners.

How on earth is this possible? Rework Dorans Shield with a unique passive of blocking 15-20 damage from ranged auto attacks and giving a health Regen buff from what it is now that scales on bonus health(excluding this item) but caps out. So if you need 400 bonus health to get the full benefit you will get the same bonus Regen as somebody with 5000 bonus health. The unique passive is reduced to 8 damage being blocked if you are within 700 range of an ally champion in the past 5 seconds. Unique passive debuff wears off after the 15 minute mark.

This is to make sure supports can't abuse this item to hell and back, ranged ADCs don't buy this to get tanky, and so that being a melee champion top lane isnt invalidated because you're laying vs a Vayne.