The Trials of Toroah - Nova Trial | VANDAL HEARTS (PS1) 100% WALKTHROUGH (Trial 1) 

if you do it right after obtaining the key, i would say lvl 8-9 if you do it (somewhat recommended) after getting Dolan, Sara and Amon, i would say 10-12 yeah :D

hey there :) i just wrote a huge text as a reply to your other comment, you get the answer there :)