EMP Kobolts are burned by Flame Auras, so they’re not really a problem. Skyguards are recommended to have Deadly Strikes to deal with the bubbled enemies from Viper’s Fangs. Only 3 lanes to watch, which makes this easy to solo. Stand in the middle lane for assassins – skyguard will damage them, while Viper’s Fangs will bubble them up.

My ascension build on my first completed solo attempt is shown below. Only the relevant ascension points shown for brevity. All shards are maxed.
Ascension Recommended: 250 (84/83/83)

Monk (86/85/85)
Defense. Full Defense Speed, 60 Flame Aura Power, 5 LSA Power.
Utility. Full Defense Crit Chance, 25 FA Gambit.

• Flame Aura: 15.2k Mark
  • Deadly Strikes
  • Destruction
  • Defensive Critical Damage
• Lightning Strikes Aura: 14.6k Mark
  • Defense Rate
  • Destruction
  • Defensive Critical Damage
• Sky Guard Tower: 15k Totem
  • Vampiric Empowerment
  • Fortification
  • Deadly Strikes (or Defensive Critical Damage, if you don’t have Mystic walls)

Mystic (86/85/85)
Defense. Full Viper’s Fang Health.

• Viper’s Fangs (Wall): 15.5k Totem
  • Fortification
  • Explosive Guard
  • Shielding Guard