Suggestions for this UU team?

Question

I've been playing around with this team in Pokebank UU on showdown for some time now, and it's pretty solid but it continuously has problems with Pokemon such as Porygon Z, Staraptor, Togekiss, etc. Suggestions on making this team better in any way would be appreciated! Even if it means switching out a Pokemon for a different one. Here is the team:

Machamp @ Assault Vest
Ability: No Guard
EVs: 172 HP / 252 Atk / 84 Spe
Adamant Nature
- Dynamic Punch
- Knock Off
- Bullet Punch
- Stone Edge

Tentacruel @ Black Sludge
Ability: Liquid Ooze
EVs: 252 HP / 240 Def / 16 Spe
Impish Nature
- Toxic
- Scald
- Knock Off
- Rapid Spin

Honchkrow @ Life Orb
Ability: Moxie
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
- Sucker Punch
- Brave Bird
- Pursuit
- Superpower

Flygon @ Life Orb
Ability: Levitate
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Dragon Claw
- Earthquake
- Dragon Dance
- Fire Punch

Azelf @ Life Orb
Ability: Levitate
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Nasty Plot
- Psyshock
- Fire Blast
- Dazzling Gleam

Serperior @ Leftovers
Ability: Contrary
EVs: 56 HP / 200 SpA / 252 Spe
Timid Nature
IVs: 0 Atk
- Leaf Storm
- Hidden Power [Fire]
- Substitute
- Leech Seed

Comments

Azelf is a good lead, and that roles suits it better than Special Attacker. It's kind of frail, so it can't set up Nasty Plot and sweep. Most probably, a strong STAB can bring it down to low health and Life Orb damage will simply make it faint itself. I suggest using this set as a lead for maximum efficiency:

Azelf @ Focus Sash
252 Speed/ 4 HP / 252 Attack or any such variant among the three. Max speed is must, though.
 
 - Taunt
 - Stealth Rock
 - Explosion
 - Protect / Toxic / U turn / Knock Off

Don't get me wrong, Azelf has excellent sweeping potential in UU, but you need a dedicated lead, and Azelf is excellent at that. This is merely a suggestion, and you can try this. Continue with it if it works.