Hey, Belsidus! I hope you get to stay here and have a great time on the forum!
Arcane Wizards are slow and deal damage that demons are resistant to, so I wouldn't recommend using them, especially on Pamdaemonium, which is pretty strict. Here's my advice:
The Tesla is an extremely useful, arguably-OP tower that excels in slaying armies of foes with no physical resistance. Make 2 of those on the left and right of the map, upgrading each to the same level at the same time. Make sure to get Overcharge and fully upgrade it on one side, and focus your spells on defending the other side to balance your defence against the waves that equally assail each half of the map.
You should get enough just gold for 2 Sorcerer Towers between the wave after the Demon Imps and the arrival of Cerberus, so make sure to place Sorcerer Towers next to each Tesla and get the Earth Elemental, whose durability can stall Cerberus while the mages take off half of its health. Leave the elemental unupgraded until it starts to lose HP fighting Cerberus, and upgrade it when under 60 HP in order to fully restore its health and stall Cerberus longer.
The last hard wave comes after this, where a bunch of Demon Spawn, Gulaemons, and Lords come. The Elementals and reinforce cannot block them all, so get a barrack in the very centre of the bottom of the map, between the Sorcerer Towers who are between the Teslas. Upgrade to Paladins and get all of the defensive bonuses, being Shield of Valor and Healing Light. Demon Explosions are negated by armor, so get the armor upgrade soon. Preferably, buy 1 Healing Light upgrade to make it start charging, then upgrade armor, and finish up the upgrades for Healing Light. Holy Strike is also important on Normal or Veteran because the Demon Spawn can survive the Overcharge Blasts and need AOE attacks to be finished off.
If you like calling waves instantly like me, you'll have extra gold and might be able to fight an extra Tesla before Cerberus. Build it on the left, near the first Tesla on the left, and just get Overcharge. The other upgrade is twice as expensive (plus 1
) and too risky before getting both Earth Elementals. Also, as the Flareons come out, keep your hero away from them at all times. It's better to level them up by dealing reduced damage to the heavily-armoured Demon Legions than to not level up at all because they're dead. Kiting them and using reinforcements is a possibility, but usually too distracting, leading to the loss of a couple of valuable lives in the process.
After the massive wave of demons after Cerberus is done, things get a lot easier. Spamming Teslas, Sorcerer Towers, and Ranger Hideouts across the map with get you enough crowd control and DPS to deal with Moloch and his minions.
If you have anymore questions, let me know. I can also get screenshots to show you step-by-step what to buy and where to use Rain of Fire.
The game has no levels as hard as Pandaemonium, so enjoy the satisfaction of victory while you can.