Is he worth it?

Should I fuse up my ghost face one more time before buying him in the krypt this week and before possibly opening any ghost face dk packs?

I previously brought him from 3 to 4 with diamond fuse up cards, should I do it again from 4 to 5? I’ve been spending many diamond fuse ups recently but I think it might be worth it. Since I typically use them nearest fusion 3 and only on good characters.

So should I ensure my ghostface reaches 6 or nah? I’ll definitely be buying him in the krypt soo?