Posting because I saw a Sunclaw Starhost army list at the UK Masters tournament, and didn't see a discussion for it yet.
It looks like something straight out of the battalion discussion and saurus warrior discussion threads, with a Slann to teleport the hordes, and two Priests to give charge re-rolls. Those threads implied a low/mid power level, but this did alright even at the highest level of competition. So that seems promising. Has anyone else tried this at tournaments, or know the guy who ran it?
Here's what they ran, according to the bad dice website:
Slann
Sunblood
Priest
Priest
40 warriors - clubs
40 warriors - spears
10 warriors
10 skinks
5 Chameleon Skinks
Bastilodon
Sunclaw Starhost
Tbh that's the first time I've seen someone use multiple blocks of 40, most of those threads did focus on just 1 block. Which might be a tad bad.
As for the actual tactic. Bringing priests does mean you can give re-rolls. which has both the benefit of giving them re-rolls for charges and saves. This both makes getting the charge easier and it gives them some much needed protection. A re-rollable 5+ only fails 4 out of 9 times, instead of 2 out of 3, which is fairly siginificant improvement, add in a mystic shield and a summon starlight and your big block might actually be capable of surviving longer than half a turn.
Having 2 blocks does also guarantee you'l probably get at least 1 block into range reliably, they can't all be shot. Especially with the save re-roll and a possible mystic shield. Did he use the double teleport trait?
I can see this make for a "working" bloodclaw starhost. Especially against melee armies. However, it does look relativly easy to counter with a shooty army or to just get screwed over if your initial turn doesn't turn out near perfect. Also, and this is the main flaw that the sunclaw has, the moment you start losing those horde bonusses your units lose so much power they're barely going to kill anything with a decent save. He only needs to lose like 22 saurus in total for his army to be pretty much hamstrung due to the loss of the bonusses.
But yea, I could see a tactic like this "work" though I'd go for 3 hordes if you're going this way. Or at least get a proper third threat. Have the first 2 hordes teleport buffed and charge in damage your opponent as much as possible while the third threat can approach unharmed have the third threat wipe out the remaining survivors. It could work. Though it does require a very good first turn and an opponent who isn't shooting heavy. A heavy shooting army would probably wipe out way too many warriors too quickly.
Possible fun variation if points allow it:
Slann with double teleport
Shadowstrike host led by a priest with 2 units of chameleons and whichever flyer you prefer
Sunclaw host with at least 2, preferably 3 blocks of 40
An extra priest, two extra if you have 3 blocks of 40 warriors
General tactic: buff your saurus, now dump everything on top of your enemy while your slann sits back with his priests and watches the carnage

Decent amount of wounds and a hilarious amount of turn 1 teleportation on top of your enemies face. It's only going to work once (if that) but it should be absolutly hilarious.
On a sidenote, the hell are those skinks doing in that list, they don't seem to synergize that well with the tactic I'm assuming he's using. Idem with the bastilidon actually. It's not powerfull enough to really function as that third threat I'd expect and it's not going to keep up with the hordes to help with the initial onslaught ether.