Quote from Taizo;1194686:
If you're serious about that, mail to 'Freemon' thanks for being on-topic
@ironwoman You gotta tell me where you get all your stamina from then, I have around 250 stam after capping production and have to guzzle potions because I use around 400 stamina per wave.
It's all spread out on numbers of skills. Obviously, production mastery isn't the only thing that gives stam.
If you think you're done with stamina because you're done with production mastery, there's your problem. Also, wiki has a list of skills that contributes to each stat, so you can look into that as well. In general, as you rank skills, you'll gain stamina fairly quickly, and it won't be an issue.
Another reason why I recommend thames set over colin set is because damage set will actually help you indirectly use less stamina. If you're able to one-shot smash or windmill, you really shouldn't need to use too much stam as you'll need to use your skills less frequently.
If you're using 400 stam per wave, you've got issues. Either your damage is way too low or you're exaggerating. Even assuming all your fighter skills and most used melee skills are rank 1, assuming you use chains 1 to 3 twice and smash and windmill, that's only 100 stamina consumed. I'd assume you can clear wave with this amount of skills used, or if you're actually using 400 stam, you're doing way too low damage. Damage booster is more in need than stamina reduction in that case.