The test

Rudra stepped into the tier ascension test arena..... Each class had their own criteria for judging .... For knights class it was a test of everything . A test for each of your five basic stats . 

For wizards their physical prowess mattered less and their intelligence mattered more and soo did their mana stat , hence they were tested on those criteria's only to progress. 

However knights were tested on everything , comprehensively being evaluated . For each basic stat there were three different levels , clearing all fifteen levels one could gain a SSS assessment , 14 would earn SS , 13 would earn S , 10-12 would earn A , 7-9 B 6-7C and 5 would earn D , any less than that and you could not tier ascend. 

Rudra was mentally prepared for this test , he had knowledge about it thanx to his previous life experience, however clearing the stages was still a feat he needed to accomplish himself.