4th edition of our local gaming small league is coming and again I find myself a bit in a pickle. They have odd point format that always ends with "77". I played in last 2 editions and even won the last one

Those were 777pts and 1077pts respectively. Now we're back to heavy restrictions and small point format.
So, main restrictions are:
- max armor save = 3+
- max inv save = 4+
- no fliers, no ordnance, no barrage
- max AV (front+side+back) = 34
- Quantum Shielding "simply" won't apply (Necron Vehicles wound just count as 11/11/11 so they are kinda useless here)
- FoC slots are all "-1" (1 HQ, 0-2 ELITE etc...)
Since I'm cut off my Wraiths and Barges by this rules, I'm not sure what to pick.
Help me decide
The roster will definitely include:
HQ:
- Destroyer Lord /w Warscythe & Mindshackle Scarabs (145)
TROOPS:
- 10x Necron Warrior (130)
- 10x Necron Warrior (130)
HEAVY SUPPORT:
- Canoptek Spyder /w Particle Beamer (75)
97pts Remain, so what should I choose?
1)
2x Destroyer to run with lord and provide some anit-
MEQ shooting?
2)
6x Scarab Swarm to run with lord as "wound shield" and possible vehicle wrecker?
3)
5x Scarab Swarm + Gloom Prism on Spyder = same as above + some anti-psyker protection?
4)
Other if you have other ideas, share them with me
Thanks in advance!