No Scrapper is truly squishy, but Fire Armor is towards the squishier end of the scale, and Fire Melee provides no mitigation to help the situation.
"That's because Werner can't do maths." - BunnyAnomaly
"Four hours in, and I was no longer making mistakes, no longer detoggling. I was a machine." - Werner
Videos of Other Stupid Scrapper Tricks
Thank you Werner, I think i'll go with /SR instead.
Depending on your budget, you could also consider Shield Defense. Fully-IO'd, Fire/Shield is everything that Fire/SR is, and more. For a budget build, though, Fire/Super Reflexes is pretty amazing. It's perhaps the cheapest way to solo AVs with no temporary powers or inspirations.
"That's because Werner can't do maths." - BunnyAnomaly
"Four hours in, and I was no longer making mistakes, no longer detoggling. I was a machine." - Werner
Videos of Other Stupid Scrapper Tricks
I love to play my Fire/Fire scrapper more then mine fire/sr and fire/sd, but this is only lvl 27 right now so that will change 
Fire/fire can be squishy at times you just need to know what you can do with it. Fire/Sr is amazing and can solo AV with a very low budget I only spent like 30 mil on mine and can solo AVs. It will be tougher but you do lose damage.
Now like Werner said Fire/SD can be just as tough as /SR and can do just as much damage as /fire, but you do need to put some inf into the build but it will be while worth it 
"All right, they're on our left, they're on our right, they're in front of us, they're behind us...they can't get away this time"- Chesty Puller US Marine Corps
Anyone tried this combo? Does it have good survivability or is it squishy?
Thanks!