Very interesting thread. However, the Iowa's 32 Tomahawks would have absolutely no role in an antiship engagement. The TASM stockpile was entirely retired or converted to TLAM's after the end of the Cold War. There is not a single Tomahawk in the US inventory that could target a moving ship right now. If an Iowa were reactivated, there is no reason to believe that they would not mount TLAM's as this would be consistent with their presumed shore bombardment mission. In a theoretical 1 on 1 engagement vs a Kirov, it would have use of 16 Harpoons. That's it. The Kirov would never allow itself to get within visual range of the Iowa, so the Iowa's 16-inchers and 5-inchers are all useless. Besides the Harpoons the only other thing of relevance in an antiship engagement is the Iowa's 4 Phalanx CIWS, only two of which would likely be facing. I submit that the Kirov, with a more relevant antiship and antimissile design, would have the advantage.The Russian's feared the Iowa class. But they are gone now.
A good question would be the Kirovs vs either a Tico or one of the South Korean Cruiser sized KDX-III AEGES Destroyers.
Lots of Tomohawk capability on both vessels, and lots of very good anti-missile defense.
The Kirov's 20 shipwrecks are a potent threat, but the Tonmohawks outrange them...and if the Tico or KDX III is outfitted for anti surface with 32+ ASMs, then it would be a tough fight if the AEGIS vessel found the Kirov first.
But the Kirov's have decent anti-missile defense too...it would be a test for the systems for sure.