Avenger's Academy: Nightcrawler & Phoenix

Avengers Academy features a PVP team that is easy to acquire and works at lower level brackets.  It'll have a budget, low level focus for the items, and won't use items that are no longer in the rotation at the time of printing.

Swashbuckler Nightcrawler (Infiltrator):
ISO-8:  Steady
Shadow Dance >> Triple Threat, with his Night Kick if you absolutely need to stun someone critical (like Modern Thor), and Ambush to trigger bleeds once they're stacked on a target.  Repeat as needed.

White Crown Phoenix (Blaster or Infiltrator are both fine):
ISO-8:  Steady
Phoenix is fairly straightforward.  Mind Link Nightcrawler if he has (or will easily get) combat advantage, otherwise whoever has the most HP is a good choice.  I often only attack with Mind Blast, since it allows you to avoid protects and cannot be countered.  Telekinesis is good if you absolutely need to stun someone.

Once Death and Rebirth triggers, use Phoenix Fire ASAP and watch the opposing team burn!  If you have White Crown Phoenix, this will give you another Death and Rebirth which is pretty nice.

Bruiser Agent
ISO-8:  Steady
Key items:
Curative Reach
Brutal Claw

Brutal Claw is available through the store, as well as mission gear from 3-5 (epic boss) and 4-2.  It applies a bleed and Ravaged, which with Nightcrawler's alt costume allows you to bring a lot of pain really quickly.

Curative Reach allows you to heal your team, and is available in the mid 20s.  It's a staple almost all the way through the low and mid level pvp scene, allowing you to keep your team alive long enough to set up and do damage.

Other items are of your preference:  I am fond of things that provide shields to help keep Phoenix and Nightcrawler alive longer.  Magnetic Field Generator is a particularly good one, from the epic boss in mission 4.4.

Summary

Total CP Cost:  160 if you buy both alt costumes with their cheapest choices, 96 without costumes.

This team is slightly more expensive than the last one I featured, but it has one advantage:  The costumes aren't 100% required to run this team.  They are certainly a huge improvement, but the base characters aren't useless, unlike some costumes which really make or break the characters.

This is a very defensive team, that wants to play the long game.  Use this team if you see a lot  teams with a Tactician running around, because it can quickly mop the floor with them thanks to Nightcrawler.  If you are seeing heavy (2-3) tactician teams, you may want to run the Infiltrator Phoenix instead.

DISCLAIMER:  At the time of writing, Swashbuckler Nightcrawler is bugged, and his Ambush is not proccing Hemorrhage.  I still believe he's fine to use, but be warned.