AS MP if you want to redeem on non-EK travel, and generally better value. If you are going to accrue sufficient miles for a decent redemption. 5x LH J should give you probably in the region of 70-100k miles on EK, not sure on AS. EK redemptions are tricky, depending on the point of departure taxes and surcharges are quite high, and availability can be hard to come bye, also the miles required can be quite high.