I have used this setup many months ago but abandoned it because even though i can dominate the archery my eles can still be hit with onangers behind my line moving them out of range puts them too far away with their slow speed to counter a rush as my army then is vulnerable. Numidian light camels where still no match with 2 - 3 exp(1.2) for prathoreon cav. to attack the cav with my eles could mean my inf/1 ele will rout to the urbans v quickly. The archers must be in front of your line due to their short range and are vulnerable to light cavalry from good players especially as light camels are that bit slower when countering. I have been very successful with the tactic but its too brittle to rely on. so I switched. I have no doubt that i am maybe missing something thats why my ears pricked up when i heard that someone else uses eles reliably.