The first Colossus

Welcome back!

As promised, here is a briefing of the fight with the first Colossus:

This is the first Colossus (obviously) and enemy you encounter, therefore it is quite simple to defeat.
The first ting you have to do is to get to the location of the Colossus, a simple task. The place you have to go is very close to the starting point and using your horse, you get there extremely fast. Close to the Colossus, you have to ditch your horse, Agro, and are forced to climb. Once you are done climbing, a cut-scene plays, and the fight begins. To kill him, you have to target the left calf to get the Colossus to kneel, and then swiftly climb onto his back before he stands up.  From there, things get more complicated since the Colossus is trying to knock you down because it knows you are trying to get to its head, the other vital point. After stabbing him there repeatedly, the Colossus dies and a final cut-scene is played.

The first Colossus, aka Valus

Using the scale described in the previous post,  (for each category there is a scale from 1-10 where 1 is 'piece of cake' and 10 is 'nearly impossible') I rate the difficulty of this Colossus as follows:

• Difficulty finding Colossus: 1
• Difficulty exploiting primary vulnerability: 1
• Difficulty defeating Colossus: 1
• Average difficulty: 1

Did you bet this Colossus? How would you rate it? Any suggestions? Let me know in the comments!
Hope you'll come back for info on the second Colossus!