No Dark Seer and No 6th slot map device t17

I did 120 maps and no dark seer plust did 3 x t17 maps and didnt get 6th slot device.
Anyone can help me?

Dark Seer is based on map pack size or just sheer amount of maps. Running maps with high pack size, shrine packs, shrine scarabs, and more pack size scarabs greatly influences the chances to see Seer.

Still not guaranteed. But far more likely than just standard alch and go strategy as only native mobs can spawn Seer.

As for 6th map slot, it's one T17 and one 10-way Maven invitation. Regular Maven boss fight does not work.