About sb, i have tested quite succesfully some slots:
Ancient grudge: This card is good (1rst target = chalice) against goblins g2 to deal with vial and chalice, good against stacks, WW with Vial, jitte, pox,ect
Maybe if i get bored to loose to counterbalance, i'll return to Grip, but i do not see many dangerous enchantments for us (deed can already be handled with needle/stifle, aluren shouldn't resolves, ect...)
Disrupt works fine too, good and fast answer to fast combo (belcher, SI..), good in miror, own some player that keep in my to play around daze, but not around daze + disrupt.
Threads of Disloyalty: Grunt, tarmogoyf, confidant, ravager, ect..., legacy is a fast format with cheap creatures, and in this deck with low curve, threads > control magic
oh, and for creatures config, i choose
4 mangouse
4 tarmo
3-4 dryad, since its still the weakest link, we can cut 1-2, cause 10 or more threath is already a good number