Need advice for a bomb/toolkit build
The only real option I see is to drop backpack regeneration, which seems buffed since last patch.
But as you have healing bombs, you should be ok.
That frees up 10 points for the Power Wrench trait in Tools.
You can always take 2 more defensive traits in the Inventions line, as you pick the less falling damage and the toughness to power traits now.
Protection, invisibilaty, etc.
Not increasing your bomb range is ok if you’re mostly alone. In a group or when fighting many enemies, you really want to keep that.
Wiggely, wobbely and other wombaty wabbity creatures…