Im itching to make a Gladiator ( Berserker + Chi Sword

) and I was wondering:
1. If I had a GLS with dark attr (probably ~130%? idk) and the Ultiate "Knife" of my level (Ult Kalis for Lv 140) with ~100% soil, will I be able to OHKO most monsters of the town for my level?
2. Where will I be able to get nice AP accs? (Other than boss/alti accs) Or are Boss/Alti accs the best/only way to go?
3. Do Glads make good "bossers"?
Note: I'm actually choosing between a Glad or a Thief Master, so convince me to get a Gladiator XD