That double powder set certainly looks interesting, but what exactly does it have over Amoonguss? Amoonguss can pull off the same double powder strategy, but it's far bulkier and has Regenerator. In addition, Amoonguss can absorb Toxic Spikes.
Anyway, I've used Techniloom, and I must say it's actually quite disappointing. I was hyping it a lot because it would theoretically function as a better offensively-oriented Terrakion check than Scizor, but in reality, you realize that so many Pokemon resist both Mach Punch and Bullet Seed (i.e. Celebi, Lati twins, Dragonite, Salamence, Tornadus-T, Venusaur, etc.). As we have already seen in Nasty Plot Lucario, Fighting-type priority gets terrible coverage in OU. In addition, Breloom's typing is awful defensively, bringing it six resistances and five weaknesses, one of those weaknesses being a nasty 4x weakness to Flying. It also has some of the worst defenses conceivable (60/80/60). Pretty much any attack OHKOes Breloom, and at the same time Breloom is incredibly slow by OU standards. Combine that with Mach Punch resists being literally everywhere, and I just found Breloom being forced to switch a lot. I mean, sure, you have Spore, but when Sleep Clause is active, any decent Mach Punch resist that outspeeds Breloom can certainly beat it. Oh, and, Ice Shard weakness.
I dunno, but I still find Scizor to be better, just because Bullet Punch at least hits far more fast sweepers at least neutrally. Don't make me list them all. In addition, Scizor's typing is far better, boasting nine resistances, one immunity, and only a single weakness (though it is a 4x weakness to Fire). Plus, Scizor can use U-turn. Can Breloom U-turn?