Macro to display each individual NPC total saving throw modifier. (5e OGL)

I'm attempting to have players make spellcasting checks instead of having enemy NPCs make saving throws.  What I'd like is to have a macro to display all saving throw DCs for a selected NPC token.  In case anyone is wondering, the saving throw DC is 14 + total npc spell save bonus.  This seems like the type of macro that would already exist (or something similar which could be modified), but I've not been able to find a working macro. Any help in this department is appreciated. Also, maybe it's a Princes of the Apocalypse issue, but the attribute fields for NPCs seems to be used inconsistently.

Probably the same approach as here would work:&nbsp; <a href="https://app.roll20.net/forum/post/7490274/is-there-an-api-script-for-players-make-all-rolls-5e-ua-variant" rel="nofollow">https://app.roll20.net/forum/post/7490274/is-there-an-api-script-for-players-make-all-rolls-5e-ua-variant</a>