Never use laser sights or scopes it will significantly lower the eco of your gun. Use only the biggest amp that can fit in your gun. In this case its beast.
On entropedia you can see your weapon's dpp with those attachments on, you can then compare the dpp difference of using only amp, or amp + laser sights/scopes.
I personally disagree with this. Attachments provide a sizable skill bonus, and skills go up faster, combine that with a SIB gun like you have and it would be a shame not to get those maximum gains.
For the PED...ends up alot cheaper for the skill gained over time.
Sure, gun economy might be better with out them, but the skills in the end are worth less, and people tend to forget that factor in "Eco" calculations. Skills have value, and it adds up.
I certainly didn't expect or factor the 100k ped gained at sale when I chipped out in 2008. (admittedly it would be less now, skill prices dropped a bit) Still, that is a sizable amount, how much broken down over all my hunts I have no idea...but it was something. Even if it were 8% bonus of hunting skills, that could make a big difference over time. That and of course, you unlock everything faster.
I use Hunnir lasers and Jzar scopes
I would go beast amp (maybe a mod or adj beast fits better ) so you arent burning ammo where you get no benefit.
The other thought is rage (L), or bulltac (L) amps might fit that gun alot better, though you would be paying markup, and need to keep buying them. What that magic MU number for matching eco to a fully used dante...I really am not sure.
....but thats just my stance.