I've been getting crushed on agility as well, specifically rooftops.
Premium scripts from several vendors/clients as well as a 1 off private script for progressive rooftops, survival rate is basically 0 with any extensive use personally.
Agility courses on the other hand... I've been able to make out pretty well by botting them sparingly (maybe 1-3 hours at a time). Still get banned a lot, though it is nowhere near the death sentence that rooftops have been.