This is for my solo deck, I use Blood/Blade. I'm about to make myself a long term goal, and in the long term, expenses are not a problem.

In another, old dead thread, it is explained that Abuse is best used on the builder weapon. It is also said that Abuse only has one chance to active per ability, no matter how many times it hits. But is this only true for multiple hits (burst) on the same target? What if you use an AoE attack and hit 5 enemies? Is that still only counting as one hit for proccing Abuse?

Aggression is good - if the target is weakened. By the time there are 8-10 stacks of weakened most enemies are dead and buried, so I've quit using Breakdown and 12 Gouge.
I don't want to be locked into using Breakdown or 12 Gouge, so I think I'll not use Aggression.

I think Breaching is a better choice for the consumer weapon? My Pen rating is just 574 + Woodcutter, but it's enough to penetrate 25% - 35%. I use either Dark Potency or Iron Maiden.

Any other weapon signets to recommend? Opportunism perhaps? I always set afflicted state so I can use it. But Opportunism is very cheap, and usually things are cheap for a reason, so maybe it's not so good?

I'm using Laceration on head.

This is my current solo gear plan, it includes talismans too: tswcalc.