Okay, I took some of your advice and this is what I came up with...

Level 40 Champion

Superstats:
Level 5: Super Presence
Level 13: Super Constitution

Powers:
Level 1: Force Bolts -- Energy Refraction
Level 1: Power Gauntlet
Level 5: Laser Sword -- Crippling Challenge, Rank 2
Level 5: Jet Boots
Level 8: Energy Shield -- Laser Knight, Rank 2
Level 11: Defiance -- Rank 2
Level 14: Mighty Leap
Level 17: Conviction -- Rank 2, Rank 3
Level 20: Resurgence
Level 23: Bionic Shielding
Level 26: Sparkstorm -- Electric Personality, Challenging Strikes
Level 29: Support Drones -- Rank 2, Rank 3
Level 32: Inertial Dampening Field -- Rank 2
Level 35: Chest Beam -- Rank 2, Rank 3
Level 35: Lightspeed
Level 38: Enrage -- Rank 2, Rank 3

I changed some of my stats around with slots and the final results are:
CON: 204
PRE: 202
REC: 135
END: 138
STR: 101

I tried dropping REC. With multiple mobs on me I was getting by fine with just Defiance and END. However, I noticed on 1v1 fights my energy generation was too slow for Laser Sword spam. So I decided to keep REC as a secondary stat. My energy generation is decent for both occasions now.

I picked up Enrage and aimed for 100 STR. Even with 100 STR it feels like 8 stacks of Enrage is giving me a 30% damage buff, which is quite nice tbh.

END seems more than fine where it is, even with Chest Beam. Fully charged Chest Beam takes up 60% of my energy bar, which still isn't bad considering I don't toggle PA powers. Most of the time I just tap Chest Beam for the damage debuff. With Chest Beam debuff and Enrage maxed my Laser Sword still manages to hit for 800-850, and that's without Particle Acceleration or Rank 3.

Threat hasn't been much of an issue since I boosted my damage some and learned how to rotate my powers a little better in battle.

So far I'm happy with the end results. I feel like a swiss army knife for tanking.