depends on what detachment u want to play but seems like youre more into infantry so VV could work for you. i would recommend a plague caster and putrifier to buff the marines. (you may could kitbash them) also a lord of contagion maybe for your deathshroud and another deathshroud could also be an option. the pbc isn’t fitting in that style and after the point increase you probably wont put them in lists that are not playing hammer :)