Tactics for the 2sm4d(3) map.

I would like to ask more experienced and skilled players about playing on the 2v4d(3) template. If there is already a topic discussing tactics for this template, the most optimal hero, city, and upgrade choices, as well as undesirable options, please just provide a link and don't criticize me for duplicating the topic. I would also like to know approximately what milestones should be reached and when. Currently, it seems that the map is well-designed and balanced for online matches, so I would like to understand how to play on this template.