What if we reworked items as a whole to increase base stats by %s?
= 5% increased max health (per 400g)
= 10% increased magic resist (per 450g)
= 5% increased magic resist (per 300g)
= 5% increased AD (per 350g)
With this, we can add utilize named passives to add class-specific stats.
+20% AD, Unique passive "Attacker": +20AD
+10% max health, unique passive "Defender": +200 health
+10% armor, Unique passive "Physical armor": +20 armor
+15% magic resist, Unique passive "Magical resistance": +20 magic resist
If we had base AP, we could do AP items like this too.
with 40% increased AD,
with 30% increased AD.
(both 40%)
(25%) = 105%
,
15% max health and 20%armor/25% magic resist.
would be 15% max health and 10% AD.
would be 15% armor and 20%MR (And would add actual numbers with its passive instead, i think).
would be 30% max health
would be +10% armor.
So total we have 65% increased health and 45%/45% armor/MR. 3465 max health (assuming a health of 2100).
This means tanks would have less of everything, especially MR/Armor. It wouldnt even double.