Is 2 raiders, 2 venoms and 2 ravagers enough in 1500 pts?

Here is a list I just wrote up
Archon with HB, VB, PGL, SF and soul trap
2 Haemmy with liquifiers
6 Incubi in a raider with ethersails and night shields
4 Grotesques with Liquifier in Radier with ethersails
5 Wracks with liquifier in venom with splinter cannon
5 wracks with liquifoer in venom with splinter cannon
20 kabalites with 2 dark lances
2 ravagers with night shields

Plan is for the Kabalites to sit back on objective and snipe, Incubi with archon to hang back as counter attackers.
ravagers to do what they do and long range pound vehicles
Grots and Wracks plus a haemy to charge forward and give them something to think about.

Looks pretty good. Although 20 warriors with 2 dark lances hmmmmm.... Its a descent choice but kinda look at trueborn 4 blasters in a venom or 2 dark lances but only 5 people compared to 2 with 18 splinter rifles. Unless accompanied by an archon or HQ that is descent in terms of survival. Splinter Rack spam is also a good choice as 20 shots twin linked is not a joke lol.

I agree with eldritchwarmaster on this.

Based on what you list, I only come up with 1437 points. So you have some room to spare.

I would---

drop those kabalites down to 5, give them a blaster and put them in a venom with splinter cannon and night shields

Then take trueborn with 3 blasters in either a raider or a venom

you'll have about 5 points left to play with to buy something shiny.

The short answer is a qualified no.

A competitive 1500 list will have something like 10+ skimmers. I myself field 9 and a Jetfighter...and often hear grumbles.