Suggested Progression Here is the summary of the progression as shown in the video.

Player Lv Recommended Mercenary Guild Skills Area
15 1st Tier Bowman Payon DS Lv2 Payon Dungeon
25 2nd Tier Fencer Izlude Magnum Break Lv3 Orc Village
45 4th Tier Fencer Izlude Magnum Break Lv5 Orc Dungeon Lv1
65 6th Tier Bowman Payon DS Lv7  

For Ragnarok GGH, the developers decided to implement the 10,000 x Tier for the pricing. Thus, a Tier 4 Fencer would cost you 40,000z.

Other References