Wow, I'm surprised someone caught Ace Siren already. I guess this round most newer players have better luck than the seniors. Even myself after finishing up all my 12 free SHT from multiple Id still couldn't get any 5*.

I'm very hesistant to buy coins because of this.
Anyway, out of boredom I checked out these new FFV and see which of them can tip the balance of the game. So far, only analyzed two:
ODINFrankly, I never played FFV before, but I've met Odin countless number of times throughout FF series. Top 5 summons apart from Shiva and Ifrit. At reborn Ace, his maxed stats are:
HP 4725
ATK 4116
DEF 4079
AGI 4439 
His best skillsets are:
DEF+20%, physical+4, ATK+25%.
Hands down, the new fastest non-bordered guardian in this game. Bye bye Barbie, bye bye Marco. overall, Odin is the opposite of Golbez. Massive ATK, average WIS with sonic speed and decent skillset. Thankfully, he isn't OP like the other older guardians (Morrighan still the most OP). He doesn't have QS, no Last Stand and though his physical damage may bring down a lot of guardians via ohko, some will still survive his onslaught especially the almightys. No, none of the normal cards would be able to survive his damage (I think), but the almightys that would normally survive him are Xmas Banshee, Golbez, S. Bird, Behemoth. There are other almightys that could still survive Odin's physical hit, but the ones I mentioned are the notable Elite favourites.
To use him, its probably not advised to place him in the first slot, mainly because he will always lose to Almighty Lamia and Almighty V. Specter. Although I'm quite sure he will win against a RB Ace/Sonic Barbie/Marco, I think he will lose against a RB Ace Morrighan. Also, Odin doesn't have LS nor QS, so that makes him an individual player. Place him somewhere in the middle or last five spots to disrupt enemy's flow. Hopefully, if he meet guardians like Rubicante, Ettin, Shiva or the likes or LS guardians such as Atlas, Nuada or Thor, he can take them out properly (not tested/proven).
I forgot to add this, but I think a RB Ace Odin has better defensive quality than a RB Ace Golbez. And because of that, I believe he is also a suitable candidate for the last spot. He may even be able to tank a Frenzied Jugg's QS, and perhaps even a Maniacal Jugg's QS. (really wish I could test this)
So overall:
DURABILITY: 10/10
STRENGTH: 9/10
SPEED: 10/10
MAGIC: 6/10
SIDE NOTE: I wouldn't consider making a Sonic Odin despite his massive speed. He doesn't have QS to boot and despite being faster than Morrgihan, Odin could still only hit once before Morrighan's turn. Its also useless against alm sonic lamia and v. specter, they're still faster compared to a sonic odin.
Thx for the details analysis...btw Sonic Barbie is faster with 4460 :)of course ...not sure what is the Agi for Sonic Odin...