Ok, awesome.
I think this was the statement that confused me from that presentation (I read it before posting aswell):
"Use downtilt omnidirectional antennas when ceilings are above 25 ft (standard low gain / integrated omnis such as AP65 and AP70 OK for lower heights)"
So I guess the fact that the 305-315 are downtilt omni is the key here.
How far of the ground is the integrated downtilt omni a good option,do you know ?