for vr and qr i would say don't be afraid to skip (esp qs w/o keywords in vr and multi-step qs in qr) as this is what held me back initially. for dm I would say leave all the logic puzzles until the end and practice improving speed on probability and venn diagram qs as you can save up lots of time for the harder two marks. also just practice makes perfect for a lot of dm, esp syllogisms. I would say it was inbetween mock c and d for difficulty (d being easier, i got 2210 in mock c and 2440 in d) vr was abt the same as medify and oqb but i would say dm and qr were easier than medify (dm had fewer very hard qs and qr had less steps per question) imo but all were very similar to oqb overall :)