From this link: http://rappelz-forum.gpotato.com/viewtopic.php?f=7&t=916013&sid=ee5bcb489bdd0beb40344d250cc5b276#p5364793
The following information was grabbed about r6 staff:
Here is the MATK and how much it cost to make Lv10 (in HV)
Lv1 693
Lv2 707 (2.9mil)
Lv3 721 (3.2mil)
Lv4 736 (3.5mil)
Lv5 750 (3.8mil)
Lv6 765 (4.2mil)
Lv7 779 (4.6mil)
Lv8 793 (5.1mil)
Lv9 808 (5.6mil)
Lv10 822 (6.1mil)
One open question is whether or not the strike cube was applied before or after the blacksmith leveling.
For comparison, a +12 r5 2handed staff has 908 matk (presumably level 10.)