[Skarg]

There is a fairly long list of spells that can be extremely useful, powerful, and/or battle-winning, that a surprisingly large number of veteran TFT players haven't seen the use for. Aid is certainly one of them.

I almost never spell these out, because I think the game is more fun when people discover uses for them on their own. And especially when they aren't just spamming something in play that they read on the Internet.

Aid has as many uses as high ST, DX, and IQ have. It "only" last two turns, but in those two turns, it can be the decisive difference between life and death.

In our campaign settings, we've had it very common not only that the apprentices (and therefore, almost all wizards) learn Aid, but that there are fairly common groups who train people (even non-wizards, even in original TFT, where that meant a -4 DX penalty to cast spells) to cast Aid, mainly to Aid ST for other wizards. Especially if you have cheap labor, military, minions, or slavery, it's a very useful multiplier of wizard effectiveness.

Also, in your campaigns, most adventuring parties going into dangerous situations, would try to have several NPC comrades, allies, servants, and/or hired help. One useful type, is an apprentice or someone who knows Aid, mainly to aid wizards. So just because that might not seem like a popular PC choice, doesn't mean they don't appear in play.