heavy 412s
When slinging heavy loads with the HP or EP, you really need to pull up to near 94 or 95% mast torque. Now with the way the torque needle swings between various helicopters you need to be careful around 94 to 100%.
If the load is starting to move while holding this power, wait, it will come away gently without much need for addition to collective.( As the disc settles and becomes more efficient)
3 items will cause her to overtorque, 1, addition of collective obviously, 2, using your feet ( so be very stable on those pedals) and 3, addition of forward cyclic. Now, you may think well thats a load of good because I need to fly the load away right? Once you get lift on the load near 95% MTq, very gently add the forward cyclic, the 5 -6% up your sleeve will normally be enough to allow the torque needle to spike up to the 100% limit. What it is doing is measuring the added aerodynamic force to the rotor system by your forward cyclic input.
Now add turbulence to the equation and you will need to allow for this as well, however generally if your load is not moving at 94 to 95% Mtq it may well be a little heavy for you to carry out successfully without setting off the overtorque light.
Hope this is of help