While Paladins of Feln are in control of some amounts of magic, unlike their Mage brethren, they are unable to form spells. For this they rely on their order's crafters to produce Channels: objects that force magic through per-written, recast-able spells.
When casting a spell, stick your staff in the opponent’s mouth, then cast it. Works well with thunderwave, cause the person explodes.
Catapult bombs at people.
Build a rail gun
All barbarian party
All wizard party
All monk party, stun them
All Paladin Party, nobody expects the Spanish Inquisition
All rogue party. Steal whatever isn’t nailed down, then come back with a hammer and steal the nails.
Group casting
Wizard with a gun
All moon Druids, all Blink dogs, then all phase spiders
All Battlesmith artificers, have your steel defenders combine like Voltron
A non-tragic backstory
Dig a network of tunnels beneath the kingdom, this will help us later in establishing a pipeline infrastructure. The pipes will be filled with steam mephits.