I am level 21 and I am on my way to Castaway Cove. Are there any key creatures I should have picked up or I should aim for in the near future? I have captured just about everything I have come across In the sand area, the volcano and even most of the ones back in the Golden Grove. I have been using Griffy and have not had any issues, but I know he wont last past mid game.
People tend to grab Bonehead and/or Little Big Horn for physical resistance. Grab Turbandit, awesome fire mage. Purrloiner is awesome Get a Lagoon Naiid/Shonky-Honker if you didn't choose it during Trials
Everything is a matter of opinion.. I personally prefer 3+ move speed/attackers. I can't stand using Bighorn even though I've controlled him all game. I have been logging stats of every level of every familiar I've captured and Bighorn is trash in every form. I don't even know why I use him. That cat is insanely good though.. there are alot of other options, but those are the ones that are near you now that'll last all game.
As you can see, Bighorn actually sucks. He's barely better than a level 30 upgraded cat in his 2nd form at 45. I have stats of pretty much any physical dps'er and he is by far the worst with no other advantages. Remember, stats are very random so you might get lucky and pull out 3/3/3/3/3/3 on your levelups. Unfortunately, I was averaging like 2/2/2/2/2/2's at BEST, sometimes 1s in there. He's terrible. Do yourself a favor and don't use him. Just get the skeleton instead.
Looks like cat is way better than I thought.. he's even better than the skeleton in literally every way except 24 attack and 32 magic defense. Only benefit skeleton has is physical defense resist and I think his Bone Baron at 99 is godly. Cat is just too strong