Getting plugy is a mod that allows you a few features that you’ve said, but it doesn’t mean you don’t have access to bnet. You click “run PlugY” or “run d2”. The d2 will take you to your normal game access to bnet but PlugY will take you to the modded game mode.
Another option, as ZloR said, is add the ladder Runewords via text file. I have permission to show you a guide with a link for downloading the text from google drive, if you want.
At jsp we aren’t allowed to talk about how to get PlugY (but you can just google it). Whatever you do, remember to play the game to have fun!