Well, just about every item on your list is currently viewed as "not optimal"
If you just get a Wrath of the Hive Mind box, you'll likely have most of what you need.
Currently the "best"
HQ is a Winged Tyrant with twin Brain Leeches, and a Thorax Hive...that runs 240...that leaves you 510 for the rest.
I'd suggest some basic gaunts, and some extra Synapse. A Venothrope, or a Malanthrope is also a very valuable unit for the boost to cover saves.
Good luck! And welcome to the Hive Mind!
So a suggestion...
HQ: Winged Hive Tyrant...240
Troops: Warrior Brood, x3 with a Cannon (Strangle) ...100
Troops: Hormagaunt Brood, x15 ...75
Elite, Venothrope Brood, x1 ...45
That leaves 290 for a Big Bug and some "extras....Personally for low point games I like a Tyrannofex with Acid Spray, and a Thorax Hive for 185, and I often add Adrenals for 15 more...the remainder can buy gaunts, or some more Elites...