Cmdr has got you covered, dont invest in more warriors, or if you have your heart set on more buy them after the codex comes out, as they are in a bad place currently.
Immortals are much better, overall tesla is more advantageous, I like to run 2x10 man units, one of each weapon type (keeping the o/lord with the Tesla). Its a relatively cheap and effective infantry combo. I've noticed the
ap-2 coming in handy more often than not.
Flesh out your scarabs, seriously. I'm a huge proponent of using them, they are very cheap and effective screens, as most of our main firepower comes from vehicles in this edition. I have 36 bases painted up, although I usually only run 27 (ish).
If you have money to burn, Tesseract Arks are our best vehicle, mobile gun platform with lots of dakka. The sentry pylons are also very good, putting out more damage, but being more fragile and less mobile
The gauss pylon is self explanatory, very powerful.
Our close combat is currently too expensive to rely on fully, it is good, but the points add up quickly. I would go with casters and blades too, the extra attack is nice, I just dont like the D1 that all the weapons put out, really removes their punch as a
CC threat.
Automatically Appended Next Post: In saying all this, if your playing against marines, they benefit from their saves much more than horde armies, so a big squad of tomb blades with scopes will shred them. I enjoy them myself, do lots of work for me in my games.