Can we make runeglaive more like devourer?

Current: Enchantment: Runeglaive Builds out of [Sheen + Jungle Item + 200g] Stats: 40 AP 200 Mana +10% Cooldown Reduction UNIQUE Passive - Spellblade: After using an ability, the next basic attack is converted into magic damage and deals 75% Base Attack Damage (+30% of Ability Power) bonus magic damage on hit in an AoE around the target (1.5 second cooldown). When attacking a monster, this also restores 6% of your missing Mana."

I think it would be nice if it had a stacking passive like 20 mana or 1ap or maybe even a spellblade that ramps up for kills/assist large monster kills. Also it would be nice if they kept magus in the game since we have both devourer and warrior.