I mentioned this after the NPC reflow was implemented, but I'm doing it again.  I suppose I should have kept mentioning until it affected me again.  The Sparks are level 25 and 26 and drop hacker interfaces.  The problem I have is hacker interfaces are needed for to code abilities below 25.  Also their collector item is wear level 23.  Without aid from higher levels people cannot attain those items.  IMO, the Sparks can either be made lvl 19 - 21 or another mob with that level range can drop hacker interfaces.  Interfaces for other trees and craftable items are dropped by NPCs appropriate for their level.  Here's a table I made, note I only took the level by NPCs that were near the HL I used.

Frag Type       Mob Level
Coder              13
Awakened      13
Operative       18
Clothing         18
Consumable   20
Tool                19
Weapon         22

 Where is the love that Virologist and Patcher get?  Look at how low the mob level  for coder and awakened abilities.  This imbalance should have been considered before the NPC reflow.  This issue has been around to long for it to be changed now amd I doubt anything will be done about it, but the devs can prove wrong.

 MrMatador 

Thanks for teh quick reply.  I understand it would be at least a few updates before an apropriate change to be added.  Personally, I would prefer to see the sparks lowered to level range 21-23 to make farming the frags and collector item attainable by those who use them.

MrMatador

Moving the frags to another mob is a good solution too.   Then I'd recommend increasing the wear level of the Sparkling Fedora Hat to 24 or 25 because right now it's tough for a level 23 to kill enough Sparks to get it.  When I got my 2nd RSI to 23, it was too difficult and had to switched to my main RSI to kill them.

MrMatador