On teaming:
Know your team, what they can do, what they're likely to do, and adapt.
This is true of ANY AT, but the squishier you are, the more important it is.
That said, here's a note from the perspective of a longtime Scrapper and sometimes Fire-blaster:
If you are playing with a scrapper, understand the Scrapper role. It used to be that scrappers tended to be thought of as "chase the runner, wipe the minions" fighters. It's no longer true(and I'd debate that it ever was, but that's not the point here). The scrapper inherent, Critical Hit, is specifically geared towards making them more effective at a "top-down" priority-- IE: Boss, Lt, then Minion. Scrappers worth their salt will beeline for a boss with the intent of taking it off everyone else's hands quickly and without fuss. That's what they're built for these days. The *really* good scrappers will check and see if any Voids/Quants/Sappers/other irritants aren't being engaged by other members before they chase down the bosses.
The point here is effeceint targetting and use of powers. I'm not saying "hey, scrappers are better than blasters, let them have the "glory" of the boss kill" by any means. This is about synergistic teamwork. A scrapper's increased crit rate against higher ranks means they drop bosses pretty fast. Most blasters have at least one heavy AOE(and some, like Fire/, are AOE *gods*). That means they'll drop a pack of minions faster than the scrapper ever will. When the Blaster(s) drop a pack of minions in seconds, and the scrapper tears the boss apart soon after... There's not much left to worry about.
This has been my teaming philosophy with both my Fire/Fire and MA/SR of late, and it has worked well. Stuff tends to get cleared quickly enough that we don't have to strain the Defender's ability to keep anyone alive too much, and it's just the ticket on Tank/Scrap/Blaster-only teams. Sometimes there's some aggro issues, but that's where other tricks come in. I will often follow a Fire Breath/Fireball/Fire Sword Circle chain with Rain of Fire to deal with the aggro issues left over after the carnage. It should be noted that with the changes we got in ED(specifically the perceived decrease in Tanker survivability), dropping RoF in the middle of the warzone is no longer a guaranteed way to piss everyone off as it once was. Or at least, thus has been my experience lately. Similarly, Knockback and so forth have also seemed to lose the ill-favor they once suffered under.
