None of the Aerondight mods currently up solved the issue I had with the Aerondight sword. When Geralt can one or two shot enemies getting ten stacks in a single battle becomes nearly impossible, even if you are able to not get hit. So getting a kill while at 10 stacks, to get the permanent damage increase, is very difficult. Then you need to do it 50+ times.

What my mod does is make it so that every kill with Aerondight will give a permanent damage increase regardless of the number of current charges.
Charges are still necessary for the Critical Hit Chance bonus, though. So this isn't too OP, it just reduces the amount of grinding necessary.

Optional Files:
Added a second file for people with de-leveling mods. Instead of getting 10 extra damage per level difference between Geralt and Aerondight, which for deleveled items means it's always 0-10. Now it's Geralt's level divided by 10.
So for every 10 levels Geralt gains, Aerondight gains another 10 extra damage. 100 extra damage at level 100 doesn't seem too OP to me. And certainly better than Aerondight just always having 10 extra damage.
Includes the original changes. Please choose one.
Note:
In order to make it work with LEGO (https://www.nexusmods.com/witcher3/mods/3369) I needed to make the following change.

modlegoItemLevelsNormalized\content\scripts\local\itemLevelsNormalized.ws

function GetScaledDamageBoost(inv : CInventoryComponent, itemId : SItemUniqueId) : float
{
var boost: float = inv.GetItemModifierFloat(itemId, 'PermDamageBoost', 0);

//if(boost > 10)
//boost = 10;

return boost;
}

Added a third file. Aerondight is always at 10 charges. Every hit has increased crit chance, every kill powers up the sword, and FX are always active when the sword is in use.