OMG Fiesta load-outs for Arena!? Genius! Shishka!
BTW, Jetpack isn't useless. From my experience they all have their uses but it's highly contextual based on gametype and map (and in some cases, what your teammates & opponents are doing).
Urk swears by Jetpacks on Powerhouse. Me, not so much, I much prefer Sprint or Armor Lock on that map for most gametypes in the Beta. However, on Swordbase, I loves me some Jetpacks. Invis is the one I generally use the least but even so, last night I had a great time as an unstoppable cloaked Elite on Overlook, sneaking in to destroy GenB uncontested in a few different games. Though, Evade+Sword/Plasma Repeater was also an extremely effective option. Man I love playing as an Elite.
And speaking of Urk.. it's 4:30PM, the update isn't published and he's MIA. I think he's upstairs in a playtest, at the expense of our loyal, loving community.