Life Orb on Foretress is a bad idea, just because it loses its Sturdy. I know it is to boost Explosion Power, but if you need to use Rapid Spin? Then you Spin, lose ypur Sturdy, and Foretress os KO'd by a strong attack. Look, use Normal Gem, it is way more powerful, and useful, because Foretress won't stand more than 2-3 turns anyway.
Stealth Rocks on Armaldo is good, but it will be better to use Rock Polish and 252Atk/252Speed Adamant nature, so Armaldo can sweep.
Choice Band Scissor may be good, but use Bug Bite over X-Scizor. Bug Bite has 90 Power, and the latter 80. Or use Superpower for coverage.
It is a bad idea not to use Quiver Dance on Venomoth. Use it over Stun Spore.
Use Life Orb on Galvantula, because Galvantula really apreciates 30% boost. Believe me, it is much better, and Galvantula has average defences anyway. But Moves are good.
I have nothing to say about Volcarona, life orb benefits it.
Well, that's it