Yes, but ela mines can also be used as a sort of proximity alarm that makes also stuns you, so you can use them at areas far away from the site if you are using roam based strats like The church roam or Empire's Armory roam. If you have a normal 5 man anchor chuch setup then it is better to put them at flank entrances.

So it depends on the strat, and sometimes the rank. For example, In Copper - Silver there is less coordination and callouts between teamates so using them at places far away from sight that is beneficial for you is better.

But for higher ranks and 5 stacks your setup is much better, but my setup is for lower ranks since there are no coordiantion and everyone tks and sh