what type of increase?

[candicane]

I am making a top-down raglan cardigan. (I am not using a pattern) The body of the cardigan is an open lattice work kind of stitch so I don't think that I want to use YO as my increases. I think the eyelets from the YOs would compete/clash with the lattice pattern.

I want to do the increases on the purl rows, but don't know what type of increase would look best.

The Lattice Pattern is:

Row 1: purl
Row 2: YO, K2tog

Repeat these 2 rows.

candice

[knitqueen]

I would do a pfb (purl into front and back of stitch). It does leave a slightly noticeable strand of yarn on the right side but with your stitch pattern it would be disguised and I bet almost invisible.