Hi,
In my opinion (slightly controversial) in current (today's) versions of Helix and SPPB:
- Not using Font-Family settings in addons, just leave everwhere blank.
- Not using Typography from Template Options
But I would use Google Font website to generate only those fonts, and weight that I really use, then with that I would add it in Template Options > Custom Code > Before < / head >
and in custom.css or Custom CSS, I would define font for each HTML tag (body, H1, h2, H3, li ....)
A simplified version (#2) would be to simply use Template Options > Typography (but be very carreful what I set, to not make duplicates, as many webmasters does)