No, even the best type of Phoenix & Stymp Bird is bad. Only get them if you have an average deck, but you can keep Stymp Bird to reborn. Stymp Bird will gain Quick Strike when reborn. Now the new battle style is Last Stand + Quick Strike.

In the future, people will be aiming for;

Atlas (last stand)
Stymp Bird (Quick Strike)
Nuada (Last Stand)
Sphinx Empress (Quick Strike)
Gilgamesh (Last Stand)
Morrigan (Quick Strike & Last Stand)
Chariot (Quick Strike)

Those will be pretty much the standard guardian & their arrangements in most S rankers.

Yeah,guardian from snowfield

Thankfully, we have Cimson Keep to help with our stone(iii) needs. Got me close to 30 stat stones(iii) on my second round now.

Get mine lar. Pretty decent type also... Fast Golbez, already level up nicely.
For me... Brave>Chaotic>Int>Fast>Power>Cool>Sexy

Let's see... 32 STAT(III) for low decent type + 25% (for being golbez) = 40 STAT(III)
No extra for level 60, and clean, so just 40 STAT(III) if you want it.

If I were to trade this in GCF, I'll ask for 50 STAT(III) because extra for leveling up.

Got one as part of trade. Sexy Bahamut Lv 1

Can reserve for you. 7 STAT (III) can?

*Bad type = 10 STAT (III) - 30% for bahamut lousy type = 7 STAT (III)

Not urgent. My other acc still doing Crimson keep, so got some stones coming in still...

To prepare for rebirth:

1. Choose 2-3 of your best guardians. Concentrate on making cannons for your deck!

2. Use the 4 & 5th best to trade for rebirth partners for top 3, as well as feeders (prefer Lv 55 four stars and GS) and stat stones.

3. Sell all unused 1* and 2* feeders, as each rebirth will need 5000GP (if same as Jap GC) and you will need more GP for leveling them up from 1 to max again. Maybe 20k total for each rebirth (unless you can get all Lv 55 feeders, then probably only need around 7k GP each)

4. Save stat stones and check max stat possible on guardiancrossx. Don't waste them. If too much, trade for smaller stones. Or leave it for now if current stat less than 40 away from max stat.

All except giant. Worthy guardians to reborn and be the new 5*.

Phiew... Barely beaten Lv 20 Boss for Crimson Keep Nightmares Mode..
Bloody shitzz.. they combine the Poison Arch + Manical Jugger + Reviver VM..

Got to climb 10 levels and whack it to lvl 30 and take on the next challenge..
It's gonna be tough, but the rewards is too sweet to seducing...

U cleared the nightmares mode? So lvl 30 it's actually easier than Lv20?
Check at GSX - Jap version lo

So in another, example,

Let's say the S.Bird has the agi buff, but opponent still moves faster than her in first round, and she can't survive the OHKO.. so the agi buff alrd also useless lo..?

Only agi-debuff will still got abit use, as it might makes the 2nd slow guardian moves before the opponent guardian

Yea, useless in your scenario. Agi buff on a super fast guardian like Stymp Bird can slow down the next enemy guardian A LITTLE BIT only. But I don't know how to explain this part because it's kinda complicating - FF ATB system. You can check out on that. Even for me, I roughly understand only haha.
I don't believe in def or tanking at all at the moment.

2 elements means more chance to critical hit enemy. If you got Fire & Poison, more enemy will be weak to you.

yes.
i think i have the worst deck here =/ haha. have only few aces, and few decent 5*. when rebirth comes out the day after i'm pretty screwed. it's like reborn job/ 3rd class comes out and i just started playing ragnarok. lol. hope they will make a special coli for noobs like me ;p