Extrudes these two edges deleted one point to make a nice triangle, then merge the edges.
Merged these two points, also notice I've excluded a single edge at the bottom of the nose. Now time for a mesh update Base Mesh12.
Extrude the marked edges, and where its marked red i've deleted a point to make a triangle.
Extrude the marked edges.
Extrude the edges marked here.
Extrude a few more times then merge together.
Select these edges.
Edges extruded.

 

Merge the edges.
Extrude edges.
Extrude from marked edge and merge other edges.
Time for another mesh update, BaseMesh 13.