You can abuse the refund mechanic and the increasing the cost of the governor to instantly transfer gold. First you recruit a governor in the city you want money in, then recruit the governor in the city you want the money to be taken from and then you refund on the city you want the money in. Say, the first governor costs 500 and the next 1000, the game will refund you 1k on the first city and 500 on the second, effectively transfering 500 gold.
According to reddit, Lord sword has a 0.1% chance to instakill a non-boss enemy, and a 1 in ten million chance to instakill a boss enemy. Doesn't look very useful to me unless someone wants to brute force through RNG a particularly tough boss.
If both cooldowns are up, the raiders will pick (as far as I know randomly) one of the spells, and then use the other one shortly thereafter. It's also worth noting that if you have 3 fireball skillbooks, each one has its individual cooldown and will be used separately from one another, meaning that you effectively have 3 fireballs each 30 seconds.
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 "Idle Raiders"){kind=icon}