sure. just slot a little end reduction and you should be fine..
then there's the other stuff..like keep Sprint turned off during combat, don't leave Healing Aura on auto etc etc..
perma jump is ---> /up 1
i always say get stamina it is amazing to have it slotted so u never run down below a certain level of energy even durring huge boss fights.
Pace makes a big difference too - if you're playing with someone who doesnt want to steamroll through everything at breakneck speed, Stamina becomes less important.
It should lead to an intersting dynamic where you hold off on healing your girlfriend a little bit in order to get cheaper end cost on your powers. Talk about playing with fire? Mental! 
I'm always up for skipping Stamina if I think I can get away with it, partly just to be contrary.
To me it sounds very dangerous. The blaster isn't exactly the most durable and you risk that she dies before you're able to take advantage of vigilance.
If you're planning on taking Leadership, which is a super pool for a supporter, providing defense, to-hit, damage and possibly vengeance, then Stamina IS vital, since your toggles will be sucking you dry of endurance. But they're worth it.
My emp doesn't have stamina at 50. He does have endrec slotted in his attacks, plus hasten (and 20% IIRC global recharge) to bring RA back faster
@Catwhoorg "Rule of Three - Finale" Arc# 1984
@Mr Falkland Islands"A Nation Goes Rogue" Arc# 2369 "Toasters and Pop Tarts" Arc#116617
I do the same thing for all of my characters..... I play them, level up, and pick the most compelling powers that are available at the time. That is, when I have characters that eat through endurance more quickly (tanks, scrappers), Stamina becomes a compelling power early on, so I take it. Generally, I can see long before level 20 that I'll need it, so have already picked up Health. Swift is so good by itself, it gets chosen early just to cut back on travel time. By 20, those endurance-hungry builds that need Stamina will get it.
But on some builds (mainly my defenders and some controllers), I've found that the Fitness line may not be as attractive. I brought a Dark Defender up to the late 30's before I got Stamina, and that was because the most attractive powers were already chosen and Stamina looked better than the choices left.
Play your toon and see how she works out. If you feel you need Stamina, take it. If you feel you're getting along fine and there's other powers you'd rather have, take those. You'll find out eventually if you're really going to need it. At worst, you just have to pace yourself for a couple levels until you can get it.
Arc ID#30821, A Clean Break
The only problem with defeating the Tsoo is that an hour later, you want to defeat them again!
"Life is just better boosted!" -- LadyMage
"I'm a big believer in Personal Force Field on a blaster. ... It's your happy place." -- Fulmens
My girlfriend has started a character to play with me, a Fire/MM. She's somewhat inexperienced with the game, as in she has played one other duo with me a couple years ago up to 32.
My thought was that the endurance discount of Vigilance combined with RA up about 1/3-1/4 of the time, I would be able to do decent without Stamina. I know once I IO out, I'll be able to rotate Conserve Power and RA to keep my Stamina near limitless.
Will this work?