There are several ways for you to overcome a Scarlet Blaze's CC abilities. Granted, they are one of the strongest classes currently, so it's always going to be tough.

Using clones and hoping that the reflect lands on them is a popular strategy. You say that you can't afford reflect ninja, but the easiest one to get is Kurenai. If you haven't saved up for her, that's a mistake on your part, as Kurenai is a must, at least to have around.
Not having Kurenai either means you f'ed up, you are a relatively new/weaker player, or your server in general is weak. Either way, get her, as she'll come in handy.

The best way to deal with the reflect of a Scarlet Blaze, in my opinion, is taking a hit. Tailor your combos in such a way that you can take the hit of one debuff. If you really wish to acupuncture that Scarlet Blaze, create a combo that poisons or ignites before the acupuncture comes in, so you get hit with some poison, but the acupuncture goes through.

It's true that Fire Mains don't seem to have a hard counter, like other classes, other than destroying them as quickly as possible, so good luck to you.