Why is bonus damage from most AD item procs per level while most AP items rely on scaling?
Just curious about this difference.
: 60-160
: 50-120
: 200% base AD
: 65-320
: 100
All AD items that have bonus damage procs that only scale their base damage with level. 
is the only item that breaks this trend. Meanwhile:
: 60 (+10% AP)
: 100-200 (+35% AP)
: 175-250 (+30% AP)
: 75-150 (+25% AP)
: 75% base AD (+50% AP)
: 100 (+10% AP)
: 15 (+15% AP)
With 
being the exception as it scales only with enemy max health.
