If he could increase his strength to the standards of a Tier 1 Swordsman, he could easily deal with the High Lord ranked Scorching Lamia.
The Scorching Lamia had 500,000 HP. Possessing the superior battle recovery of a High Lord ranked Boss, the Scorching Lamia could recover 10,000 HP every five seconds. If players did not possess a DPS[1] of 2,000, Cela was, essentially, invincible.
This was one the reasons even an elite team of hundreds of players could not exhaust a High Lord to death.
Not to mention, the Scorching Lamia possessed frightening attacks and overly powerful skills.
If players wanted to raid Cela head-on, it would be no different than seeking their own deaths even with a team of thousands of players.
However, it would be a different story if they possessed the Flaming Sun Scripture.