OK, thanks. A controller is actually what I lack as well.
My problems with this were diminished because, even at level 1, two PCs had attacks to deal with minions: the human ranger had Dire Wolverine Strike and the warlord is a dragonborn. So between the two of them, they cleared half of the kobolds outside the waterfall in the first few rounds (and they got a surprise round, to boot). In addition, the ranger's longbow with Twin Strike was essential in downing two minions per round.OK, thanks. A controller is actually what I lack as well.
...yeah.....Played intelligently 10 kobold minions with +5 to hit with ranged attacks doing 4 damage/hit will focus on and drop a level 1 character who doesn't have good AC on round one.
Flaming Sphere is just a super Wizard Daily. We love our wizard for it.They took it carefully, lots of scouting outside, and as Nail says bottle necks inside, plus fighting retreats (and a flaming sphere) helped.
The kobolds started out spread out (again, as shown in the module), and needed to perceive threats in order to react to them, instead of acting as if they knew everything the DM knew.
I followed the order of the fight (including waves 2 and 3) exactly. As the PCs used a side entrance rather than the waterfall entrance, there was no time at which all the kobolds could focus missile fire at one PC. (If you look at the set-up, the kobolds are pretty easy to catch in bottle-necks and around corners.)
It was a very challenging fight, no doubt. But the PCs triumphed.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.