welcome 
tbh, u can always buy gems if u can afford it o.0
the unit that you would want to get from this RS event would be elza
arius and garnan are decent too, so good luck with your summoning 

Depends how much you purchase. If a lot not worth. The rare summoning happens every time. The big difference is the units you are looking forward to have.

not so sure what u mean, but tbh it's totally random.
they do say that these rare summoning event offer a higher chance to get the units, but that doesn't work for everyone
regardless u should try if u're feeling lucky 

Erm my advice if you still new.. do the quest.. and collect gems after completing each map.. then summon..
You can spend later after you get familiar with the game mechanics..
Not good to invest when you are still new.. you might not like the game after a while..

BTW, I started about 10 months ago and I am a free to play (F2P) player. Still enjoying the game.
An advice is that that you need to make the best out of whatever the system gives you.. High EQ will save your wallet.

Im new too. about a month. U can just ignore arena for the time being and focus on completing maps. u'll hit a wall on the tower of mistral first. in the meantime visit imperial  city and collect metal key. later when u get to 30 energy u can start spamming metal parade which give high amount of exp for ur unit.

Added you.. Atomic is the name..
BTW, you can start listing out the summon units you have.. we will help you sort it out..
I actually jealous you get luka..  I want one...

You got us as your friends here. Feel free to ask and we will try to help you out.

Need not waste time on Arena first as it will accumulate the lose count. Might as well concentrate on leveling your summons.

Tip of the day: Anima type is always the best and if you got yourself Oracle - 75% you will choose to throw him/her away.

erm no, you have good units to start off your journey.. save your gems first by completing the quest..
is pretty easy to level up now because of the half energy quest maps and reduction of energy recovery time (from 10 minutes to 3 minutes).
Look at the level up contest news, they have a lot of goodies for you.. you will be catching up to us very soon.

Your first focus should be Mina, she is a good unit that can last you until mid game.. use her as leader, the quest will be much more easier with her status immunity leader skill.
your focus should be Mina > Farlon > Mifune > Eze

Farlon is a no brainer, he is one of the current best arena units with his low BC requirements to use Brave Burst (15 only at 6*)
Mifune you can level him for damage output, he is a freaking glass cannon.. equip him with HP spheres for survivability or if you prefer damage output, put muramasa sphere.\
Eze should be last if you have nothing else to level..

I am expecting that when you finish the first map at mistral, you should have enough gems to summon 2 more units.. let us know what you get out of it, then we discuss again.

skip it, wait 17 for faris and Hogar!

Nice summon kerry..
Anima Elza