Starting to play Summoner. Help?

[Sentinillia]

Firstly, good players are always on demand, no matter their job.
SMN may not be in the best spot regarding FCoB right now. Mostly due to the inherent MP issues brought on by the multidotting and lack of breaks for MP regen, the DPS values and kit are still very competitive. You definitely can make SMN work even in the current endgame content, though bringing a BLM over a SMN is the meta in the current right now. SMN is still extremely strong outside of FCoB.

My group currently runs a DRG, SMN, BLM, BRD setup and our SMN parses roughly:
t10 - 485
t11 - 437
t12 - 472
t13 - 469

These are all still very healthy numbers and you should play the job if you find it enjoyable. If Square-Enix deems the class to be too broken to be viable now, I am sure they are going to bump it to be up to par by 3.0 at latest.

TL;DR: Play SMN if you like it. You can make it work if you really want to.

[Tex_Mex]

My group currently runs a DRG, SMN, BLM, BRD setup and our SMN parses roughly:
t10 - 485
t11 - 437
t12 - 472
t13 - 469

One small note on this. Your SMN is using a minimum of an i125 book to reach these numbers. This is not a typical piece of gear for newer DPS players and is not really realistic for people getting into coil for the first time. These numbers would be significantly lower with the i110 or i115 weapons that are more common for new players. Basically, you have to already be part of a coil to have the gear necessary to reach these numbers. This does not apply to new players and should not be expected.

SMN is still extremely strong outside of FCoB.

I do agree with this though. SMN is perfectly viable for all non FCoB content.

[Sentinillia]

snip

Yes, my bad. He does indeed have the i130 book.
I did not take into account that it would matter in the context. That said, our similarly geared BLM only often leads by 15-20 dps and is even equal on some turns.

[Tex_Mex]

Yes, my bad. He does indeed have the i130 book.
I did not take into account that it would matter in the context. That said, our similarly geared BLM only often leads by 15-20 dps and is even equal on some turns.

Unfortunately, all of those numbers will be in the mid 350's with an i110 book and i110 gear. A similarly geared BLM should be putting out around 370-380. And a i110 geared melee can do 420+