You need to run 3 Phalanx in the deck. He and Aklys are the heart of the deck.
I only have one Phalanx otherwise I would have 3 in there. As for the rest of your suggestions:
[-02] Dragunity Javelin [probably the worst tuner in the set]
[-02] Dragunity Brandistock [you only need one]
[-03] Dragunity Militum
[-03] Dragunity Darkspear [Darkspear can be good but only when teamed up with Mist Valley Falcon]
[+02] Dragunity Phalanx [The main tuner in the deck]
[+01] Dragunity Legionnaire [You'll see why he's amazing]
[+03] Dragunity Aklys [equip him to Vajrayana or Legionnaire and blow some stuff up]
I'll swap out the Javelins and a Darkspear for Aklys and a Militum for a Legionnaire. Militum came in handy during early testing so I want to keep 2 of them. And Brandistock is a great card...Two attacks once equipped. I'm gonna keep them at 3.
[-01] Card Destruction
[-01] Dark Hole
[-02] Dragon Mastery
[+01] Cards of Consonance [with 7 targets you can run 3]
[+03] Terraforming [Grabs that Ravine quickly and can be ditched with Ravine]
[+01] Dark Hole
[+01] Monster Reborn
[+01] Pot of Avarice
I already removed Giant Trunade and Lightning Vortex for 2 Terraformings. That's all I ever use. I have a third Card of Consonance ready to be added (recently removed from an experimental Blue-Eyes deck). As for Pot of Avarice, I've been thinking about it for a while now. Not removing Dragon Mastery to do so though, easily equips the Tuners and gives an ATK boost. By the way you suggested the removal and addition of Dark Hole. Anywho I'll think about Monster Reborn and Dark Hole.
[-02] Kunai with Chain
[-02] Windstorm of Etaqua
[-02] Sakuretsu Armor
[+02] Trap Stun/ Seven Tools of the Bandit
[+02] Bottomless Trap Hole
[+02] Icarus Attack/ Dimensional Prison
[+01] Solemn Judgment
Kunai was a tech card...Works pretty well, under certain situations. I agree it needs to be removed. Gonna swap for Trap Stuns. Windstorm is staying. Again it worked well for me. Sakuretsu was actually my second choice. Orgininally I was gonna add Bottomless Trap Holes, but I didn't want it to look like an altered version of the Structure. No Judgements. All my Dimensional Prisons are in use, so I'll think about adding Icarus Attack...Whch I'm not a fan of.
Trident Dragion
Dragunity Knight - Vajrayana x2 [he is your main synchro]
AOJ Catastor
Magical Android
Scrap Dragon
Stardust Dragon x2
Red Dragon Archfiend
Colossal Fighter
I recently added 2 Red Dragon Archfiend. I only have one Vajrayana. No Catastor or Trident...Not sure if I have Scrap Dragon. Android and Colossal Fighter could be easily added. My Stardust Dragons are all in use already.