Really close to mine. I only have a slightly higher penalty for 175. I'm rolling with:
ExpLS100 = 999,
ExpLS125 = 997,
ExpLS150 = 995,
ExpLS175 = 992,
The original penalties are absolutely ridiculous. It makes it so that by level 150, killing enemies basically becomes pointless for XP and the most efficient method of gaining XP is spam farming the same quests over and over because quests are not subject to the XP penalty. If anybody ever reached 200 under vanilla conditions, I can only commend their patience but I absolutely wouldn't want to go through that experience, which probably mostly consisted of doing thousands of the Cursed Forest quest chain runs. Speaking of which, the difficulty rating of the Blood Forest quests was obviously done by someone who had no idea about the difficulty ratings of the base game quests. You get 4 star quest XP for doing 2 clicks in many steps of that quest chain which is why it was the go to XP farming method for the late game. Not the style of play I'd enjoy for hundreds of hours
I'm currently at level 189 with my Seraphim, mostly grinding bosses. And it still took an extremely long time to reach this level.