As blm i can tell you that (this is given that you use B3 T1 B rotation):

- WD weights for 6.65 int
- Det for 0.265
- SSP for 0.282 (depends on the rotation and slightly increases with your total SSp. This is my ratio with 643 SSp)
- Crit for 0.238

Then make the calculation for every weapon to get the total intel equivalent score.

This is roughly poportionnal with the dps increase from a weapon to another but you need to keep in mind that:

-after a certain CRT percentage the gain from each new crit point slightly decreases

-this is exactly the opposite for SSP

The i135 title means craps. It only means that the total amount of secondary stats is capped at 91 (if i remember well. Never managed to go above 89 on mine because of the lolrounding when you split between 3 stats) and that you have the WD and primary stats amount of a 135 wpn.

best way to compare two weapons is here.