im lvl 488 and my scant has bin 900+ since i was lvl 200 and iv only found 1 drannik ballistae. iv used 13 energy cubes and 5 try matrix trying to find some more drannik ballistaes but i cant pleas help

Holy crap... I don't even know WHAT to make of the mumbo jumbo you just typed there. Dude, your English teacher must DESPISE you. Keep typing like that and someone is going to throw a dictionary at your face.

They ARE extremely rare. Luck of the draw.

I did a NPC run 2 hours ago, with 3 times full energy (6.6k energy) and i found 3

Or english is his second, maybe even third, language.

How many npcs have you killed?

typo fest, yeah~

but that's the real thing that matters, NPC kill counts.
Your scan, ranks, energy artifacts used etc doesnt really say *beep* about this specific NPC.
In fact, the higher your scan the LESS likely you are to get it, because this one happens to be cloak free, and scans will add more NPC to the pool and thus bump off the ballistae sometimes.

I find one of those buggers every 300-500 kills or so i think, even with bad luck you outa have the set with 4-6k kills I believe

Meh. I was tired and it was from my phone.

I havent found one in a long long time, I think it would be safe to say, i had all 4 equipped by the time i was rank 200. only rank 385 now.