Yup, that was me. It's also a reason why I think that we both liked the Epic 6 modification. IMO it's just much more interesting to be smart with a limited power than to rely on some weird arsenal. If you have fewer options to choose from, you will react faster. If all party is limited, you will have to work together and design ways to synergise your capabilities. Learn how to use available equipment over trying to get some +4 Nightbringer Sword (of Doom) or another such powerhouse.
You know what was a reaction of one of my players in that kobold engagement?
What the hell is a tanglefoot bag?
said by the wizard who just got glued in place and in plain sight of attackers with slings and javelins. They forgot about some cheap item from PHB and it hurt them. A lot. It was also the first time his spell fizzled.
Here's what happened during the post-session discussion:
Druid: But still, there were too many traps. Even if the DC to evade them is low, with enough opportunities we were bound to fail at least a few of them.
Me: You are the one to talk! The one who had a fucking flaming sphere prepared! Cast it, roll it around or in the straight line through the obviously prepared battlefield and just follow the scorched safe way. That's total of seven rounds to show-off something that would already require a morale check with something that can actually activate the bulk of the traps.
Wizard: What do you mean by 'obviously prepared battlefield'?
Me: Tell me what you know about kobolds.
Wizard (looking at some of his notes): Small reptilian creatures, likely related to dragons. Sadistic, usually lawful-evil and with a fondness to capturing slaves and… oh, balls. Trapmaking.
Me: YEAH! And I told you that myself after you passed Knowledge and Survival tests.
Rogue: OK, our bad. We did fuck it up. Still, though, a tanglefoot bag? Thunderstones? Smokesticks?
Me: It's a swamp. A go-to place to find tar, sulphur, ammonia and limestone. That's what, DC 20 for Craft(Alchemy)? They had a sorcerer, you know, their favoured class. Plus it's not like they stockpiled them for decades, they had just four of each, which is 400 GP worth in total. This encounter was beneath you guys.
Cleric: Why the fuck we just charged at them? Seriously, we aren't usually that stupid, right?