Im not devon...but here's my two cents

[BadBoyz]

During the SUPERIORITY EVENT:

My Top 45 units are now mostly indestructible units, the units I have received are (too much to list):

DOMINION TANK 1,065A / 710D INDESTRUCTIBLE
K-61 ANTIAIR DEFENDER 608A / 426D INDESTRUCTIBLE
LATEWATCH GUARDIAN 613A / 503D INDESTRUCTIBLE
SUPERSONIC PEGASUS 475A / 275D INDESTRUCTIBLE
RESISTANCE LEADER 465A / 385D LOW CASUALTY
RECON DESERT STRIKER 385A / 289D INDESTRUCTIBLE
DEEP INVADER 389A / 583D INDESTRUCTIBLE
WAVEBREAKER 370A / 255D LOW CASUALTY
ELITE BASE DEFENDER 336A / 464D INDESTRUCTIBLE
HAWKER ATTACK CHOPPER 312A / 255D INDESTRUCTIBLE
RIPTIDE RUNNER 325A / 225D LOW CASUALTY
COMMUNICATION SPECIALIST 306A / 156D INDESTRUCTIBLE
and many more

I suffered minimal loss during this event, you can compare my currents stats to my signature below:

# of Alliance Members: 678
# of Units: 14,727
Alliance Attack: 110,016 Alliance Defense: 117,733
Fights Won: 33,906 Fights Lost: 4,676
Successful Raids: 30,796 Failed Raids: 1,482

Missions Completed: 7,473

Individual Special Bonuses:

+20% Casualty Rate--------------Black Dragon Fighter (1st PVP Event)
+2% Casulaty Rate--------------Black Shark Helicopter
+40% Fight Valor Payout---------Armored Transport Ship (SUPERIORITY)
+20% Health Regen--------------Deadly Bridge Jumper (SUPERIORITY I)
+20% Health Regen--------------Armored Tomcat (SUPERIORITY II)

[Tctiger]

Sounds like you may be the lucky owner of the low casualtie glitch .

[Zedsdead]

Did you have to spend gold for stamina refills? If so, how much?