I dunno how spammable they are, my concerns are more that they are a unit that, if you get it in the right position, can melt just about any vehicle in a few seconds with very little counterplay options available to the other player.
their high damage and speed, along with the buffs available to eldar, give a very small window of reaction time when setting a trap for a vehicle. furthermore, of the counterplay options available, suppression isnt as effective as normal, knockback does nothing, and they're so fast that they can outrun a lot of melee units (especially with buffs) to keep chasing the vehicle. really the best options are stuns or ministuns, but those aren't that widely available.
fun fact, fire dragons actually deal more damage that dark reapers to every armor type besides HI. although reapers have range ofc.
for some more discussion, here are some of the combos that fire dragons have available:
with any hero: webways to flank, warp spiders to completely immobilize vehicles (really what can you do to keep a vehicle alive vs warp spiders and fire dragons?), holofields from rangers, falcon as a delivery method
with warlock:
swift movement- gives them +2 speed (8.5) for 20 seconds
enhance- makes them deal 84 melta dps(105 with exarch) and +3 speed (9.5) for 6 seconds
combo-use swift movement, enhance, and dragons fury with 1 full fire dragon squad: 136.8 melta dps and speed 11.5 for 6 seconds, then 109.5 melta dps and speed 8.5 for another 4 seconds. total gives you potential of 1259 melta damage over 10 seconds running around so fast you can barely see them
with WSE:
crack shot-gives them +7 weapon range and 25% damage buff for 25 seconds
with the exarch that gives fire dragons range 35(just below standard) and 105 melta dps. which is pretty crazy. if you keep them back a bit behind a DA shield that's a huge amount of damage over the course of an engagement. ofc they always have dragon's fury to use as well for those extra few seconds of damage.
WSE also has access to phase shift, levitation grenade, and group teleport, all of which can synergize with fire dragons quite well.
with farseer:
cloaking from webway gates really makes these guys a terror. they can pop up anywhere with huge mobility and stealth. great backcappers, ambushers, and vehicle hunters with this hero.
guide-increases range and damage by 30% for 10 seconds (36.4 range and 109.2 melta dps with exarch)
doom-increase recieved damage by 40% for 10 seconds
combo-cast guide on fire dragons, cast doom on enemy vehicle, pop dragons fury, laugh while your fire dragons deal 142 melta dps and your target takes increased damage for 10 seconds. on a vehicle thats 150 real dps, on SHI that's almost 250 real dps. over 10 seconds that's almost half the health of a squad of terminators just from fire dragons.
in my opinion fire dragons could use a few nerfs. i'd like to see a few less perks for them, and a few more avenues of counterplay against them, there are so many combos and buffs that can get insane with even just one squad of fire dragons, and their cost seems to be wayyyyy less than their stats or performance account for.
