Count Rose's belief is not entirely wrong. He is confident that his army could threaten an irregular, but what if there are two irregulars participating?
During the past five days, Augustus did something to ensure his victory because he didn't know Count Rose's exact strength. He examined the moment he met Count Rose and his stats; they weren't that high for his level, but the equipment he's wearing is something.
[Charles Rose]
Level: 47 Class: Warlord (Epic-Rank)
Talent: Basic Musician (Normal-Rank)
STR: 42 (+145) CONS: 34 (+70)
AGI: 34 (+230) DEF: 15 (+120)
INT: 24 (+90) MAG: 20 (+70)
Augustus wondered how he even equipped the equipment as you need to fulfill the requirements before you can equip it.