Around 30 mins every day spent to make bstaves, gets you around 105k xp. (600 bstaves/day) Making black chaps is (assuming 1k chaps/hour made and 44k xp/needle, 22 mins of sc/needle, 8 minutes to use a needle, 30 mins for 44k xp) 88k xp/hour. 115k xp/hour if you do noncombat sc at 15 mins/game. It's actually slightly more because you get more than 20 points/game, but let's just stick to these figures. So, if you spend 30 mins a day doing bstaves and 3.5 hours doing black dhides (either getting needles or crafting chaps), you'll get 413k xp if you do normal sc or 508k xp if you do noncombat sc. Hides lose you 1.3 gp/xp, bstaves 90k/day. If you do normal sc you'll lose of 490k/day, a total of 12750k. If you do noncombat sc you'll lose 613k/day, a total of 12875k. It will take you 26 days or 21 days, depending on what kind of sc you do. The less you play, the longer it will take :D