
You know, the "14 resources to get going" may actually be worth it, in this case. The way I see it, the Unscrupulous Investor has four especially important interactions right now:
- Jenny Barnes's unique ability plays well with Dario, and I would especially recommend Dario for a Jenny deck. Raising her willpower and intellect from 3 to 4 significantly boosts her resilience and investigative ability, and Jenny's Twin .45s can make excellent use of a giant resource pool.
- Streetwise is a reliable and efficient way to ensure that double-digit resource pools can be used to full effect. For Rogues who can buy it, Physical Training also deserves a mention for, alongside Streetwise, letting the investigator buy their way to the top of any skill check.
- Hot Streak allows you to get Dario's stat-boosts as quickly as possible.
- Now for the non-obvious one: Lockpicks. When you're early in the scenario, Dario and Lockpicks provide a useful turn-loop, where you take one action to investigate with lockpicks (almost certainly successfully), one action to get resources with Dario, and one action for miscellaneous purposes like moving or putting other cards like Lone Wolf into play. Reliably getting one clue and three resources per turn makes it fairly painless to hit the magic 10. (Admittedly, many things can disrupt this loop. Welcome to Arkham Horror!)
It's worth noting that 10 of the resources you're committing to Dario aren't actually spent, so they're more like a war chest that you can sit on until the endgame, and then spend on a final flurry of Streetwise-based investigations and evasions.
My point is that, provided that you have Lockpicks, Streetwise, and Lone Wolf in your deck, Dario actually has a very nice tempo in most scenarios:
- in the opening, when there are less likely to be dangerous enemies to deal with, he's an effective way to build up your war chest while still getting some things done;
- in the midgame, he's a persistent and boost, which is a top-tier bonus from the ally slot, and provides the occasional extra resource-bump when you happen to have a spare action at the end of your turn; and
- in the endgame, he's the reason that you have like 20 resources to buy your way out of trouble, plus some much-needed damage-soak.
You can get Streetwise and two Lockpicks for just 5XP, which is often feasible just one scenario into your campaign, so this is a very attractive starting point for leveling up your Rogue.
If Dario had been available when I played Jenny Barnes, I expect I would have settled pretty early on a Dario/Hot Streak/Streetwise/Lockpicks deck, resulting in an effective, Treachery-resistant clue-gatherer who just happens to be able to transform into an unholy murder-machine with Twin .45s, when necessary.
The deck-building lesson here is that the best way to compensate for having actions that can only trigger once per turn is to get additional once-per-turn actions. Dario is there so that you have something useful to do when you can't use your Lockpicks; your Lockpicks are there so that you have something useful to do when you can't use Dario.