INT 3 + Smooth Talker perk with mentats problems?

[StrikeFIN]

I have Jinxed unarmed build (unarmed, not using unarmed weapons)

ST 10
PE 2
EN 10
CH 2
IN 3
AG 10
LK 10

Jinxed, Gifted

Unarmed, First Aid, Doctor

I delayed my first perk (smooth talker) till level 5 as got mentats at same time. Is perk broken with INT 3 + mentats? It opens most dialogs from wasteland, but still I see many low INT dialogs, even there shouldn't be (Smooth Talker give +1 INT for dialogs), and it's known that INT 4 makes your smart again.

Is problem with perk or NPC INT check for dialogs?

 

[StrikeFIN]

Not an issue anymore, got INT module.