CFPH: ZA2 Battleship Boss Hunter Achievement (MarkhovScrch)

This achievement probably the Grindiest along with other ZA2, tooks me many days to play for reward I even nearly got my Lightning Rod for few times but I didn't even get one. Requires 100 clears you can also equip some VIP Snipers to boost your clears for 2-4 but mines barely since I focus on clears. Achievement Effect: Damage against Battleship are Increase (Max)