The verdict
For a small team planning its first campaigns, pick the lookup site. It is free, it takes minutes, and it improves your first round of copy. You do not need account automation before you have an account worth automating.
If you already run paid search across several accounts with real spend, pick Optmyzr. The rules and audits remove routine checking and keep a standard across accounts, and changes made through its MCP server wait for a person to approve them.
Most agencies would use both at different moments. Look at competitors when you brief the copy, and use Optmyzr to keep the live accounts in order.