Runic Blessing Mastery Rework (Riots balance gods are welcomed here)

Old: Start the game with a 50 health shield. This shield regenerates each time you respawn.

New: First part - Any shields that you produce (abilities or items) will be 10%(subject to change) stronger. Having counts as having shield. Second part - If you don't have any items, abilities that grant shield, instead, on taking at least 10% of your max hp in any damage, receive a 100 hp(subject to change) shield for 1 second. 60 seconds cooldown. You can't benefit from second part if you have abilities or items that produce shields.

Example: A lvl 9 with lvl 5 Eye of the Storm with running blessing mastery shields you for 264 shield hp (240+24). If janna doesn't have blessing mastery, but you do, the shield won't receive a bonus and will be 240 shield hp. If you are with 1000 max hp and receive 100 damage (10% max hp) after defense reductions from 's Q, you get a shield with 100 hp shield strength that lasts 1 second. The shield won't reduce the damage that caused shield activation.

Balance analysis by roles ADC - you don't go that deep in defense mastery tree so you dont take the point Support - Useful to have as , but you would have to stack lots of AP for shields to have real strength. Remember that you won't benefit from second part of this ability which could make some trades easier. Mages - no mages go that deep in defense mastery tree Bruiser - Typical example - This would give him one second of increasing survivability during trades, but it has zero benefit if enemy harasses only once. As reneks HP and defenses grows, at 2000 hp - it would take 200 damage after defense reductions to activate 100 damage shield, so it counts as weak anti-burst. Conclusion - Good but not OP Tank - Typical example - It's very hard for Rammus to receive more than 10% of his max hp in damage in one shot, but shield on the heavy armored target is quite beneficial. Conclusion - same as previous. The strongest base hp shield in game - ult at lvl 16 for 850 shield hp and this mastery would give it +85 shield hp.

overall - a change for runic blessing to make it less niche and actually noticeable in-game

Discuss please.