Most of the chargers (including the LUC V4) have an over-current protection.
Samsung 25R for example rated as 4.2A max input current, so it should scale down from 5A setting.
IMO, charging at 4A instead of 2A (still in the safe zone) shouldn't hurt the battery drastically compare to the "wear and tear" from regular charging cycles (I mean, anyway after 2 months of using, the battery won't be even close to brand new condition).