He continued to upgrade his magical staff until it was Level 30. He didn't proceed further as he would not be able to use it if it reached Level 31. He failed another two times during the process and ended up spending 14 Iron ores and 7 Steel ores in total.
He didn't upgrade it anymore but he still opened up the Blacksmith interface to look at the statistics if he wanted to upgrade it to Level 31. The success rate was 50% without him activating the Runestone of probability. That was already including the 30% boost from the workshop's Rare tools.
This made him apprehensive about the prospect of future upgrades. The success rate was getting lower and lower with each upgrade of Level. He would have more failures than successes if he did not improve his Blacksmith job Level. However, he did not want to spend too much time on an Auxiliary job. Well, he would worry about it when it happens in the future but for now, the failure rate was still bearable.