It seems like in recent updates items that were deemed too powerful received a flat 10% damage reduction.
Let's be honest here 10% is not very much and nowhere near close enough to what would be required to fix the issues at hand.
In reality the issue is not even the damage of these weapons but rather how they work.
Firebomb: The issue with firebomb is expecting to take an edge shot for a couple seconds of burn damage but instead receiving full duration. Not to mention firebomb is a low risk high reward weapon.
To fix this I suggest reducing the radius, increasing the projectile speed and giving a flat burn duration to anyone within the radius. From here we can now tweak the damage as needed.
Mine: Since mines are stationary they SHOULD deal a lot of damage, but the trigger radius is way too big.
Decrease the trigger radius by 50%, increase the damage radius by 25% and either increase the cooldown or decrease the range. Then you can balance the damage as needed.
I covered these two since they are the most recent Nerfs but if you have any ideas to better tweak/balance items drop them in the comments

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