Hello mate, I did this about two years ago. It is a tricky build. Typically, it's bigger than 90mm, being nearer 100mm easily. I find that quite common in modelling. Anyway, my recollection is as follows.
The head & face is one single part. This plonks down into the wolf pelt that forms the shoulders, resting on the top of the torso. No problems there. The hood is divided into two left & right halves that surround the head, These fit together well, but expect to use a bit of putty to disguise the joint along the top.
The fur cloak down his back is attached to the torso around the shoulder blade area, the wolf pelt on the shoulders cleverly deals with this without issue. I felt the need to attach the cloak with a steel rod to support it. You'll have to paint the inside of the clock before attaching it - I found it inaccessible otherwise. His legs get in the way. Conversely, the cloak will get in the way of painting the legs, too.
The third tricky bit is the star of the show - the shield. I drilled a small hole in it and attached it to the arm holding it with a steel rod again. The joint in the kit I felt was insufficient to hold it.
Don't let me put you off! If you've read this far, you must be keen! It's a really good figure. What lets it down is that being metal and on the larger side, it therefore renders the parts heavy, especially the cloak and shield in particular. I used every trick in the book, using the best adhesives and scored the parts before I joined them, even using pins in 2 places. It's a rewarding project. It is good sometimes to have a kit that makes you think.
A great opportunity to paint a Roman infantry shield.