As @greenfoxy21 pointed, RS is really good on a SPR build, i had it on iCBT on my sorc as Wiz C2 > Linker C2 > Sorc C1 > Alch (due to summon SP consumption), when i used RS, and i had around 50-80 SPR, it did decreased the damage nicely, on a dungeon group, i only used summon at the bosses or when a group of trash gone out of control and i had to avoid damage and help on clearing a bit, using SC i could help on the buffering and using PL + RS we barely took damage unless it was a squish char on party, most of times the healer barely touched the heal skill, with UC it may give more leeway to be bold during a dungeon run.
If Sorc summon was changed as i do hope it did, and there is no more SP consumption or at least there is SP recover enabled during its use, it may be viable, but Feather Foot seem a better choice.
I donāt know about others, but for me, Unbind is useless, i mean, i didnāt even bothered removing the links, so that point could go to JP for the 8 links.
As for stats SPR:CON 3:1 i think its ok, if Feather Foot skills depend on INT for damage you can try balance it, go CON up to 100 then add to INT.