You need about 4k-4.2k range on app depending on your EV beam to hit north and east lane ogres. if your dst's can't damage ogres before they leave spawn theres a high chance they might be able to hit the core. I position the "1" indicated dst's towards the east spawn while the "2" dst's are positioned right by the north core. If your dst's can't hit the djinns in spawn with a range gem then the positioning of dst's is slightly wrong. This is probably the most important part of the build. If the dst's can't hit djinns, they might not be able to dps ogres before mass mobs spawn in. this sometimes messes up the targeting and mobs are killed first instead of ogres.

I use rifted gas, electric, ensnare, and dst's

https://www.youtube.com/watch?v=0FyWZuzR4E8&feature=youtu.be