Greek stress angle in art nouveau typeface

I've been wrestling with a design problem for the Greek lowercase in this late-19th-century style art nouveau typeface, Cristoforo. The upright has been long done, and the italic is pretty nearly done... but the Greek is bothering me, so I am presumably about to revisit it in both fonts.

Stress is the angle at which the thick vs thin parts of the fonts are emphasized. Traditional Greek lowercase has a different angle of stress than Latin. The average Latin font as having a stress angle of about 30° (oldstyle) to 0° (modern), but old Greek is typically 120° in the lowercase. However, more “latin-style” Greek lowercase with latin stress angles is also common and acceptable, depending on the typeface. (Greek caps don’t get the same stress angle, though. They tend to consistently get the same stress as Latin.) 

This particular typeface is a Victorian Art Nouveau thing with vertical stress in the Latin (and Cyrillic). So the Greek caps also have vertical stress. What should I do for the Greek lowercase?

Latin in the font:

Two different approaches to Greek lowercase, below—currently both are in the font. Top is traditional Greek, bottom is more latinized.

Currently, there is this odd mix. I am thinking that's a bad thing.