Can a type 1 diabetic take an insulin-resistence drug in addition to insulin to better control blood glucose?

No. That would be considered off label. Type 1 diabetes is an insulin deficiency issue. Although some type 1s may be overweight and at risk for insulin resistance, it may seem logical to consider medications to reduce that resistance thereby improving glucose control while continuing to take insulin injections.

Metformin is also used to help regular ovulation, but for someone with type 1? I have never personally seen it used.

My daughter is 10 yrs old and is currently on Metformin and Novolog as well as Lantus. She takes Metformin for insulin resistance. She is not overweight. We've only been on it a week now, but so far it looks like it's helping. I was told to have her exercise 30 minutes a day because it makes your muscles more sensitive thus pulling more sugar from her body. I am hoping soon we can lower her insulin doses and control her numbers. Hope this helps.