Migrate domain controllers but keep ip addresses

Hi all,

We want to migrate our domain controllers (server 2012R2 / DL/FL 2008R2) to server 2019 core DL/FL 2016 and keep the ip addresses but change hostnames.

Reason to keep ip addresses : many devices like printers, scanners, applications have the dns/ldap/... ip addresses manually configured to point to the domain controllers.

Current situation :

Domain controllers A and B with ip address 1 and 2 (A-1, B-2)
A and B have DHCP in failover mode (load balance), DNS, DFS, and ADDS.
C-3 and D-4 are newly installed server 2019 core domain controllers with the same roles but these domaincontrollers should have ip addresses 1 and 2 after the migration. This is our plan :

1. migrate fsmo roles to C
2. Create domain controllers C and D with ips 3 and 4, Server 2019 core, install all roles but dont authorize dhcp
3. Demote B as ADDS (dhcp should not work now on B), authorize D as dhcp server, change dhcp failover replication partner on A to D (DHCP D should be synced with A now)
4. Turn off B and remove NIC
5. Change ip address D to 2 (old B address)
6. Reboot D and monitor events (DHCP, DNS, ADDS, ...)
7. Change DHCP replication partner D to C
8. Demote A, turn off
9. Change ip address C to 1 (old A ) + reboot
10. check health state, monitor events, replication etc ...
11. raise functional level to 2016 on domain,forest
12. metadata cleanup

Any suggestions ?

kind regards