There is no need to add an ogonek to the long-tailed g, it only needs to be added to vowels. 
Adding accents to script fonts is quite a challenge. Almost every letter is a special case.
It helps a lot to add low profile accents to the font. Then you can have different accent designs for lowercase and uppercase. Complete Composites will use the low profile accents for uppercase and the regular accents for lowercase. Autopositioning is difficult for scripts too. Complete Composites will use autopositioning to centre accents on the base glyph with an offset for acute/grave and italics, but the optical centre is not always the same as the geometric centre, especially with script fonts.
Other glyphs, like æ or Þ need some creativity if they are going to match the font properly. Although you may never need more than a few accents, many users in Europe do require them for their daily work. Fonts without accents are next to useless for them.
Here is a very rough attempt. I haven’t made much effort to design the accents to match the font, they are more suited to Garava italic than to Yolanda. The low profile accents should be designed to suit uppercase glyphs, then moved down to the same vertical position as the lowercase accents. Setting the advance width to zero and using a Capital A or E in the Comparison toolbar helps a lot with the design process.