Dear Mr teleplayer,
I was once in your shoes - quest for the most durable strings! Strings durability is subjective, 1-2 week for some is considered durable while some months. My advise to you is, stick to the strings that you are comfortable with and treat strings as a wear & tear item e.g. guitar picks, polish towel etc...
And yes, please check your guitar setup too. Saddle too sharp or uneven? That roller saddle looks great. Happy shredding! \m/
Fitch