Simple but effective Automatic Local Deployment
A lot of the ideas involving automatic local deployment either are overly simplistic (just auto deploy in territories with 1 income) or require complicated coding (denote where you want them).
But, what if there is a toggle on/off button which will auto deploy your armies where you deployed in the last turn?
e.g. With the button toggled on: all your armies will be auto deployed where you already had them last turn, and you only need to adjust the changes you want to make for the new turn before committing.
If you gained a bonus, then of course you have to deploy as you normally would do. Then next turn it would however, be included in the auto deployment.
This has already been made into a mod (Local Deployment Helper) and a user script https://www.warzone. com/Forum/611386-order-clipboard-userscript-local-deploy