Helicopter rigs are awesome in my opinion! Very safe when set up correctly, and can be set up to hook the fish with the weight of the lead then allow the fish to run with less resistance. I use helis loads! For pop ups use chod rigs, which is really a helicopter rig altered and renamed! For bottom baits, choice is yours! I like combi rigs, and the helicopter set up allows you to use a stiffer boom section and not be so worried about chod and silt, so the bait kicks away from the rig well.
Make sure you have enough knowledge to set up a helicopter rig safely though! Can be the safest rig in the lake, but can also be the most dangerous! If a break off happens and the mainline / leader can't pass through the ring swivel so the rig is the only thing left then you end up with a hooked fish that can't get rid of the leader but the weight is a meter or so away, making it more difficult to get rid of than if it were close to the mouth, and meaning the lead drags behind the fish or down through the water making a snag up more likely! A trailing leader may pass through a snag (not that I'd condone allowing that to occur either) but a training leader with a lead on the END of it may not!
Thanks for the response exactly the kind of information i was looking for