I have two Glazio, one is S and this other is a D and I have 1 Soltusk D, so my is what is the best I do? Keep my Glazio S and fusion the two D or fusion my Glazio S and Soltusk D…
S+D = B
D+D = D
Really, it’s up to you. Dreadwolf isn’t that good, in my opinion.
Dunno about you guys but I kept my original Glazio just because it was the very first ark you get. I caught another Frostkit and that fire pig thing whose name I do not remember and evolved those and fuse them.
I’m using it from quite a week. Actually I use it just because I still don’t have mission arks and get to fill up the team…but I’m quite disappointed from him: not that stats improvement and…“escape”…really? ! -.-
In my opinion, you should get the B dreadwolf, because in the early game, it helps to have a good aoe for things like the OM missions. As you get more OM arks however, you won’t use it. But its fun to have. Its also decent in the beginnings of PvP, and the higher chance for BA the better.
I wouldn’t personally. I’d make a D rank one with your two D rank arks. You will feel sick when you use up your S and later on in the game you might farm starters again to make a better rank dread wolf 
how did you get the pig
There’s always the grade boosters from pvp… Though I would save those for Omega
I use him in my team. Hes an Ark that needs bonus turns to be deadly, but used in the right setup he’s a great setup man/finisher. Would not recommend starting with him though.