- Which faction is stronger? (Necropolis, Tower, or Conflux)

There's a big imbalance in unit speed in the combined army; only the phoenix will make it... the first one to arrive will be the first to win... you're exposing yourself to attacks from gargoyles or golems... and then the phoenixes die. It's especially satisfying to watch how Ice Lightning hits them hard.

Half of the travelers have the tactic skill (very useful against towers, and not only), so they'll all crawl in and attack together in one turn. You'll slow everyone down, and we'll speed everyone up. You'll throw Ice Lightning, and we'll use explosions... on nagas... on titans... it will be much more effective. ;)

If the phoenixes wait, they can be slowed down or shot down by titans...

Even if the titans deal 60 damage per bolt, it will take about four titans to kill one phoenix (if you have Expert Archery). There will be more phoenixes than titans. And shooting them down will take a while. :p

In a combined army, it's not about troops, it's about meat... Ice Elementals are afraid of fire... Storm Lightning... you're just amazed at how much damage one lightning bolt can do to Storm Elementals, especially if you start a chain reaction with it...

They are, but everyone is afraid of something, and you can't cast different spells on everyone at the same time. And will you cast a chain reaction if you have air units (which you don't even need to upgrade), for example, in your army? It's better to use an explosion.

An explosion usually takes out 200 skeletons, or even more, and this spell is a common sight in the Guild of Mages, and at the Tower...

Okay, let's calculate... roughly. 200 skeletons is 1200 damage from an explosion, which is 4 titans (assuming the elementals have the same explosion power). 2000 skeletons divided by 200 is 10 turns, which means 40 titans. :D 2000 skeletons will be gone long before that. The titans will run out, and probably the nagas too. :D The skeletons won't disappear that quickly.

You can always teleport golems to the liches... It's very useful to cast Counterspell on nagas...

And you can teleport skeletons too, and in large numbers. :D You won't even notice. And Counterspell is a real treat!

With a rush, Solmyr will definitely repel any attack just by casting Chain Lightning.

Really? Let's see (a very realistic situation - a real classic rush :D ): I'm the evil Necromancer Galtran, level 6, standing in front of your castle on 1-1-7 with 100 skeletons, 1 skeleton, 4 vampires, 2 angels, 3 liches, zombies, 100 skeletons. In my backpack, I have a bolt, a shield, Haste, and Expert Earth, Necromancy, and Advanced Armor. And what do you have? At best, you've built a castle with nagas, but without genies, if you built the wall first. Usually, after that, I have no money or resources left in the tower, so I go to 1-2-1 to build further or buy a naga.