What kind of PolyArea increment the path weight but dont't block NPC or quest object inside ?

Hello, use POLYAREA_DANGER or POLYAREA_AVOID.

Thank, but

You didn't make blacklisting npc/objects in POLYAREA_AVOID area?

Yes, sorry, my answer was wrong. Poly_avoid blacklists the area at the same time (but paths made in this area will probably be inconsistent).

The solution is to directly use

PathFinder.ReportArea(Position, Radius, TypeArea);

But, this list is cleared when the bot changes continent.