Edited by: Akita T on 03/03/2011 13:32:11
The decryptor type always has to be matching the interface type.
So, yes, for instance, shield rigs will need esoteric tuner data interface and therefore caldari decryptors, but armor rigs will need occult tuner data interface, meaning amarr decryptors.
As far as numbers of runs obtainable, I assume you are aware rigs follow the same rules as ships (use either 1 run or maxrun, anything in between is the same as 1 run, and maxrun only with a +runs decryptor for one extra at the end).
For medium rigs, using decryptors might occasionally be a good idea... but for small rigs, I seriously doubt it would be wise. If you limit yourself to large rig invention, those are the most likely to benefit from ME-enhancing decryptors, but remember to always do the math, fully and properly, just in case.
Originally by: Professor Nomos
Cannot invent with Bpcs and no decrypters don't work that way
What the bloody hell are you talking about ?
Invention is ALWAYS done with T1 BPCs, and decryptors are the only things that can influence ME of the T2 BPC.