Fix how barriers work please

[Brightamethyst]

Is there any reason you can’t just stack them like how when’s can stack regen/medica 2s? Even if there needs to be a maximum possible shield for balance, surely that could be what 2 boosted adlos give?

Unlike a regen which only restores lost health, a shield effectively increases max HP. Having that much shielding all the time would completely trivialize many mechanics.

1) You have 100 HP and two regens running. Mob hits you for 100 damage. You die and regen does nothing to save you.

2) You have 100 HP and a 20% shield. Mob hits you have 100 damage. You live with 20 HP.

3) You have 100 HP and two 20% shields. Mobs hits you for 100 damage. You live with 40 HP.

In scenarios 1 and 2 you're either dead or close to it. In scenario 3 you're still alive with almost half your HP. That's why SCH and SGE (and formerly AST) shields don't stack.