How many models do you feel you need to put in a Raptor squad to justify buying the IoE?
I've never got around to actually playing a game with the EC. How do you feel the drugs are working out for you?
I think 8-10 raptors are the only way to justify an icon. Otherwise you might aswell buy 2 raptors more. Icons have maximum effect with maximum numbers of bodies. COmpare units costs:
5 Slaaneshi raptors with icon & 2 flamers 145
10 slaaneshi raptors with icon &2 flamers 240
Consider the impact in melee or in basic shooting harassing: for 145 pts you have 5 bodies that cannot punch trough any other similarly costed unit and cannot withstand serious retaliation without immediately dropping in sub-optimal condition. For less than double those points you have a serious melee threat that can substain some punishment and still hit hard. Also, the more FnP roll you will make, the more the icon will repay itself. With 2 models saved, you have already repaid it. But with 5 man units, 2 rolls are what you can at best expect to do. With ten bodies you might as well double or triple this expectation (more bodies, more armour saves, more fnp rolls, more turn the unit is alive, hence more rolls). So, imo, 10 man units its the best investment for an icon.
About drugs...i am known for my poor rolls. Twice i used it and twice i got shit bonuses like BS and Initiative.
So, i think they are a great artifact, over a 10 games span or if you are just outright lucky. About the drugs bonus from the "rapture batallion" i think it's great because it's army wide and there is no way you have a so specialized army you cannot use watever result you rolled.