Our skin sounds the same... I'm very acne prone, especially at "certain" times of the month and if I use a product that my skin doesn't like - it just goes wild. I have very pale skin and don't tan easily (unless I'm going to tanning beds, but don't do that any longer)... So my skin scars easily because of this combination of things too.
I just got the Beauty Blenders (pink egg looking sponges) from
Sephora, and I have to say... I'm really liking them! I thought they gave great coverage and I could definitely use a difference from my brush application. I used them with Make Up For Ever HD foundation, which I also really like... For stippling brushes, I've been using the Sigma F80 and its been working pretty well.
I would suggest getting a concealer to use on other areas of your face besides under eye area. I use Amazing Cosmetics concealer in the Fair shade, and it is truly AH-mazing! It covers everything! Great for covering recent acne scarring, etc. Hope that helps!