Ok, let's get to it:
Well... it depends on the size of the army needed to win. Good luck though!
Ok, I definitely agree with that. Winning at all costs is not fun for many people.
Can't say much about Brettonian Knights except they are an old army, but I guess spamming one unit is VERY unlikely to win for most armies.
As for Stormcast Eternals (short: SCE):....well... They are a very strong army that has almost no particular weaknesses and lots of options to choose from. They will win against most armies most of the time. Some armies can build specific anti-SCE lists to halfway reliably beat them, but some can't.
I would say that they are one of the strongest armies in the game, becasue of many reasons. Not too hard to play either. So winning most of the time is what I expect from them.
About tactics in general:
Seraphon are a versatile army. We can tailor lists against pretty much anyone, but the same lists will very likely lose against other armies then. That being said: There are lists for us that are better than others of course, but overall we are not the strongest army by a long shot.
About specifics:
- "Starhosts" are our bataillon warscrolls. Basically you have a list of units that you have to play, and if you do (and spend some points extra) you get some additional abilities. Our strongest ones are probably the Shadowstrike Starhost and the Bloodclaw Starhost. The one for "spamming Saurus Knights" is called Firelance Starhost. I would call it pretty mediocre to be honest. That's because the mortal wound damage (mortal wounds are wounds that cannot be saved) you are aiming for when you play it is kinda unreliable and Saurus Knights are horrible glass cannons. High damage output but very squishy. So either you roll those 6s on the charge and cut through the SCE player's units, or you don't, and then you are toast. I played it a few times (agaisnt Ironjawz Orcs) and it worked once I think.
- The Ankylosaurus-like looking dinosaur is called "Bastiladon", and it is armed with a laser and very sturdy. One of our best units but very expensive, 300 points. And even though it doesn't look like it: Its damage output is not very reliable either. The strong thing about it is its defense. It is one of just very few units in the game that has a save against mortal wounds, and its save against normal wounds is good as well. Buffed by a Priest and/or Starpriest or a Thunderquake Starhost (allowing it to re-roll its saves and/or impriving its save by 1) makes it even more durable, but (at least in matched play, which I assume we are talking about since you mention points) there is no way to make it unwoundable by normal damage. If it rolls a 1 it is hit, like everyone else.
- Saurus Warriors are....not that good actually. The only way to make them good is to play lots and lots of them. A Oldblood or Sunblood (and others) can buff them to make them decent.
- The Assassins are pretty good for us. That means: Either Chameleon Skinks (even better in a Shadowstrike Starhost) or our flying units (in a Shadowstrike Starhost), they just appear somewhere and snipe heroes. Quite strong against armies that rely on synergies or have squishy long-ranged units that aren't well protected). Problem with the Shadowstrike: You cannot play it at 1000 points, it is too expensive.
When buffed Kroxigors are actually pretty awesome against horde units. Skeletons might have a problem against them. I would say Kroak is kinda bad for small games because he is just far too expensive for what he can do. Same for the Engine of the Gods, or a Slann.
Keep in mind that our army doesn't contain "super units" or "must-take units". We rely on our synergies so simple "face-roll" lists are rare. That means there aren't very many really bad units either. Exceptions: ...Jungle Swarms maybe. But most others get at least decent with proper synergies or as part of a Starhost.
Acceptable for me, as long as your posts are halfway understandable.