Drop the second Splinter Cannon on the Venoms/Turn the Ravagers into Dissies (imo better than DL ravagers). Then you have enough points to get a Black Heart Spearhead detachment so you can get those amazing Warlord Traits, Artefact and Stratagem + 1 more CP. Park your Black Heart Archon in cover so he can give the Ravagers his Double Aura and not be in danger (this also makes your Ravagers more durable with a 6+ FNP).
Foot slogging Archons are perfectly fine in Venom Spam lists and don't let anyone tell you otherwise. Because of how the new rules for targeting characters work, your opponent should almost never be able to target the Archon if you position your Venoms around him correctly. However, if you do this (and you should) realise that the Flayed Skull Obsession becomes a lot worse, because Archons already have a re-roll 1 to hit aura. Instead you should take Poison Tongue for re-rolls to wound or Obsidian Rose for extra range (24" Blasters, 42" Splinter Cannons, 30" Rifles, that's crazy good for an already mobile army.) Your opponent will have a very hard time being able to outgun you at that range.
Razorwings are OP so keep those.