So how do you propose to take on a Omaha in a Kawachi?
Ive had several Tier 5 and 6 matches in the Kawachi, and even unupgraded ships outspeed, range and damage the Kawachi.
20 Knots top speed, 9K cannon range. The Omaha is more like 30 Knots and 13K range. Get close? Eat some torpedoes.