There is a ton to talk about summoner and your build so it doesn't make much sence to say everything here.
Since you are new it's better that you play a build that is good for leveling up.
Keep in mind that low lvl builds wont work in end game optimally and v.v.
I would suggest, working on the build you posted, to use Hellion instead of lurker and add some aegis rubies on the 3rd tier. 1-2 at least of each set to test what you need.
Unless you are experienced in the game and have some good boutique items, having a tanky pet that you can heal will help you lvl up faster by dieing less, instead of going for an 'aoe' build.
You probably dont need r3 of desecration and blood tap rubies. Instead take 1-2 rubies in Summoning mastery.
As you play you will need to test and make your own build.
I really think it's better you make your own build according to your playstyle and how strong your char is.
(you can ignore all my comments if that build works for you)
Stat rubies, neurotoxin and healing are your priorities imo, but add rubies/talents on every aspect of summoner as you lvl up, little by little. You need to have tested everything by lvl 60.
e.g add r1 howl and increase when you can, same with tap etc, have most skills from the beginning if possible (you dont need acid)
The build you posted looks like an aoe farming/kak pvp build or so. But you can use it as a guide with few changes.
When you lvl up, ignore all the above and make specific builds for end game.