Upgrade your three first level creature dwellings as soon as possible: the upgraded versions are much better than the base versions (no retaliation against sprites; storm and ice elementals are range shooters).
Both storm and ice elemental have a wide range of damage: 2-8 for storm elementals, 3-7 for ice elementals. It is both a curse and a blessing, literally speaking: you want to cast Bless on them but avoid having them Cursed as well.
Statistically, the conflux's higher tier units are weaker than average. However, this is compensated by their strong low tier units, which gives the conflux an advantage over the other factions in the early game.
Pros
Conflux has the highest growth of units of all towns. (excluding Necropolis with Necromancy).
Several great heroes.
Phoenixes are the fastest creature in the game, out-speeding all competition by a large margin, and also have a base growth of 2.
Average speed of Conflux units are the fastest of all towns.
All units are immune to resurrection except for level 1 and 7.
Even though some town creatures can be used in Dragogeddon tactic, town creatures are still going to be easily overpowered after you use Armageddon spell if you can't retreat. So using this tactic is advised only if you have large amount of Phoenix troops.
WARNING! This town is often considered too strong and thus is banned in many multiplayer games/tournaments.