116v

[MarcoP]

I noticed that MSIs show definite long upwards strokes over i's in "vix" and ~"ahia".

Strokes like those two are common. Years ago, Helmut Winkler wrote that those thin dashes above ‘i’s are tittles added by later hands to make reading easier.

The following example is from You are not allowed to view links. Register or Login to view.. Compare tittles in line 2 with those in the other lines. In this case, it could be that the scribe just used two different styles for tittles.

EDIT: but maybe the two words in line 2 are abbreviated? I shouldn't have picked a text I cannot read (Czech).

   

This other example is from You are not allowed to view links. Register or Login to view.. Here the script originally had no tittles and a later hand added some for clarity (sic, carmina-tas in line 2, igne with no tittle in line 3).
   

I don't know about the "caret" and "four dots".