actually,13 dwarves on gold while upping to heroic is too much. 10 is just fine. During classical, of course you will be sending vills/dwarves to the various resources depending on who you're against, the map, how much hunt, etc, but the only rule of thumb i have for my eco is getting 10 dwarves on gold when i go heroic.
Tbh 13 is a stupid number.... as loki u want like 15~/+ to spam jarls and bb's, and as odin, if you're planning on and will be able to spam jarls you want more, but 13 is a dumb number and u might as well put the dwarves on wood or food (since thor dwarves gather basically as fast as a normal vill).
Also, doing a 7-5-5 build vs eggy isn't always the best option. You need to scout the map well and read the map so you can advance earlier (7-4-4) to push the isis or set player off of hunt, wall important locations, etc.