I primarily use the teslacore with diffraction-mod... a powerful weapon. With all the +3 damage mods (more than 100% stat) I one shot nearly every enemy in the highest difficulty. If I drop them down to +2 (still 100% stats) I often have to place a second shot at some enemys.
I'm on my fisrt run with tesla + diffraction as well (what a weapon!), and my main concern was about the "damage reduction" as enhanced necromorphs started showing up. So if I place more damage circuits, I guess a can even the scales. My aim is also killing mostly mobs in 1-2 shot (like it does in early game), since this weapon is great for crowd control. That's why my Line Gun looks ridiculous in late game as well - cause I haven't added enough circuits due to the weapon graphic stats in the bench. I'll surelly try it out. Maybe it can fix my detonator as well: in DS2 it can kill mostly necros, even enhanced, without upgrades (need well placed shot) in ONE shot. In DS3, with the graphic at 100% plus acid bath, it won't kill the weakest slasher. I thought the weapon was definitely broken - in the bad way - now I'll give it one more try.
The weapon at the top of the diffraction tesla is the precision tesla: it works much like the contact beam and it's purpose is to focus a strong foe, while the other does the crowd control. When those necros with Scaf armors started appearing (Impossible difficult) I was like shooting them 3-4 times with the precision tip. So the weapon lost it's purpose. Ill try adding more damage to fix it.
A shame that this bad graphic design nerfed my weapons so much on previous games. I'd rather integer numbers like in DS1 & 2 . It's even hard to tell which weapon is stronger than other cause 50% damage of a graphic is not the same value as 50% of other weapon. This stats are completely useless... (facepalm)
Going to Hardcore after this run.
Thanks for the feedback.