Farm grid brought the greatest relief, I could not play without it anymore. Other than that I only use custom graphics and render limits together with willybeths HD textures for a better look, farther draw distance and more performance (sounds contradicting, but is true^^) and sometimes a mod to remove portal restrictions.

I would like to use the extra equipment slots mod, but there have been reports lately of a bug where you can loose the items equipped in the extra slots, so I stay away from it at the moment.
Valheim+ sounds great, but for me would be too much the way I like to play at the moment.