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Seer Councils (or groups of warlocks)
Rangers (or Pathfinders)
I was wondering what would be the best infantry choice for picking up the Space Marines or similar to these armored folks (other than vehicles, monsters, or etc.)
Depends on the situation.. if you've got a wide open table and the marines are footsloggin tacs 48" away, then sure it's goin to be reapers. If you've got a transport, can survive the required set up and have seer support who doestn get nulified, sure.. banshees.
That said, I went with fire dragons. They negate armour saves, they wound on 2s (reapers need 3s) with just a transport have a 26-27" threat range, and can also kill everything else in the game barring horde. they do the job, they cause a bubble of fear on the table for your opponent and can perform other tasks as well (anti-mech/anti-MC/anti-termie etc).
Well like I said, situation is everything, but the question is framed very black and white. Going model for model, nothing kills marines better than fire dragons. Hits on 3s, wounds on 2s, no armour saves. We can have a discussion about whether the banshees extra attacks pay off when they have doom support, but going like for like the dragons would then have guide, so it's probably close.
So if you jsut want dead marines, fire dragons get it done better than anything. In a game situation the fire dragons will have other priorities, but in a game situation i can't say i would every really want to field dark reapers.. expensive, static, backline models with an average save and particularly vulnerble to deepstriking or fast moving assault troops.
Actually, with two shots, Dark Reapers will kill marines better than Fire Dragons, assuming no cover for either. That's also just on the basic reaper; the real killing power is in the Exarch with a Tempest Launcher and Crack Shot, that thing will clear entire squads of marines--in cover-- by himself.
Dark Reapers are definitely an investment, being a decently expensive static firing unit, but when properly supported they can absolutely wreck marine armies. My regular group of players wouldn't play me if I was fielding Dark Reapers (about 3/4 of them were marines). And by the time you factor in the transport for a squad of banshees, they're actually less expensive.
They're not for everybody's army, but you can't deny they are our single most effective anti-MEQ unit.
In my gaming group I can't see a tempest launcher killing more than 2 guys a turn. Spacing to avoid the blast is far to easy to achieve and far to good a counter to (small) blast weapons to trumpet them quite that much. Anyone who's clumping their marines together when you have a tempest launcher on the table is an idiot and you don't need to worry about list optimisation.
A pimped unit of reapers (exarch, tempest, crack shot) comes in at 217 points. that's the equivalent of 13 fire dragons (with change left over).
The reaper launchers will average 3.5 wounds from 8 shots, you'll likely get 2 from the tempest against a halfway competent opponent, 4 if you're pretty lucky on the scatter and manage to nick another base.
13 fire dragons average 7.2 wounds.
so reapers have a probably 5.5 with an outside chance at 7.5 wounds, while dragons come in at 7.2.
I'm not saying one's better than the other, but empirically the dragons are more reliable.
Banshees for me. My 10woman squad slices through Marines like a hot knife through butter. Not to mention the fear factor of my Fortuned Wave serpent with banshees screaming 36" across the field. While I also feel reapers have a place, for me they take away mobility that lets me control the flow of the battle.
Banshees rule - people will tell you scorpions can do the same but they simply can't.
YRIEL!!! Throw him in a squad of even gaurdians and they will kick arse. Put him in anything worth a damn and they will PWNDIZZLE.