Could you please provide a valid justification for your statement regarding the "high cost"? Calculate the total resources required to fully upgrade Necropolis and Sylvans, and compare them. I can do it if you want...
If you need confirmation, here it is. I don't just talk, I also act. The table below shows the data calculated for all ranged units. The calculation takes into account that the unit being attacked by the ranged unit has no defense (i.e., has a defense skill of 0; this is not entirely realistic, but it can be achieved with a spell, but that's not important. I needed to create a common framework for the calculations, so I used 0). And please don't judge me too harshly; I tried my best. :)
And in general, I like the units from Inferno, especially the Devil. There's no need to even mention Sylvans; I like them because the best units should be numerous in a castle, which is exactly what the Sylvans demonstrate! :)
I'll try to find a link to the complete calculation with formulas. I can't promise, as it was a while ago, but I'll try because we didn't calculate it so thoroughly ourselves; we mostly tested it in practice. If I have time, I'll calculate it at home today, including for the ranged units in Heroes 5.
If I was too abrupt anywhere, I'm sorry; I didn't mean to offend anyone or belittle anyone's work. :(
Uuuuy.....I couldn't find that website with the calculations, but I found a good forum about Heroes 5 with a mathematical focus. :)
Added after 1 hour 41 minutes
Comparison of the average damage dealt by various ranged units in the amount of the weekly increase to monsters with a defense of 4/12/20:
Improved Archer - 99/76/58,
Fanatic - 92/66/52,
Evil Eye - 72/53/42,
Medusa-Queen - 72/53/42,
Lizardman Warrior - 42/33/25,
Magog - 73/56/43,
Powerful Lich - 150/109/86,
Master Gremlin - 48/38/28,
Archmage - 89/64/51,
Titan - 200/160/120,
Storm Elemental - 75/55/43,
Ice Elemental - 72/54/42.
Grand Elves - 140/104/81.
With the Sniper skill at the expert level, - 196/155/121, which puts them in 2nd place in terms of damage.
Sorry, I made a slight mistake in my previous statement. Well, it turns out that Grand Elves are 4th on the list, not 8th, right? And the fact that I said they were 2nd was a mistake in calculating the shooting skill. :(
It turns out:
1. Titan
2. Cyclops
3. Lich
4. Grand Elf