Why is my luck for drops so good?

Hey, I am a level 35 enchantress and the last 2 times I've played the Lost Expedition I got 3 purples and 1 pink but I only played about 3 or 4 stages. Is this average? No one else in my party has gotten a pink or purple in my party except 1 person got a purple. Am I just used to the swamps drop rate, so then this feels insanely common for purples and pinks or was I just lucky or what?

Thanks!

Not common

It's like rolling dice...mostly luck.

I'd say it's luck! Luck sure is nice, isn't it?

We farmed in line and I found probably 75% of the drops...very odd(4-5 people playing)