I can't pretend to anything like flamethrower49's expertise with the game, but here in embryonic form is a collection of thoughts I've had about The Scholar since I started playing Shattered Timelines.
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THE BASICS
As I see it, The Scholar will primarily follow one of two primary routes through a given game—tanking and counterpunching.
Tanking
He can tank with Flesh to Iron(s) and use his play phase to boost/shield other characters with Don’t Dismiss Anything, Proverbs and Axioms, and Alchemical Redirection—the “tank-and-crank” strategy. The Scholar will vacuum up damage and effectively give everybody else double turns.
A slight variation on this is the “tank-and-bank”—focus on mass card drawing (Bring What You Need, Know When to Hold Tight) and await the right moment to deploy Know When to Cut Loose. I think this is generally suboptimal when done in place of tuning up the other heroes, but against certain villains (particularly ones who have a built-in waiting game like Dawn and Spite), strategic deployment will make inevitable victory a mathematical certainty.
Counterpunching
Flesh to Liquid(s) + Flesh to Energy(s) makes The Scholar a punching-bag that punches back. He’s still tanking, after a fashion, but instead of shrugging the damage off, he's using it as fuel for a heal-to-damage attack through his base power or “Get Out of the Way!” or any out-of-turn healing from other heroes. His health will yo-yo up and down from round to round, but, barring bad luck, he shouldn't be in real danger of dying; there are just too many ways for him to regain health.
ATTACKING
Know When to Cut Loose is a sucker’s bet 90% of the time; you’re better off playing the cards for their individual powers or banking them to keep one or two Forms going. 10% of the time—when capping off a “tank-and-bank” strategy—this card will win the whole damn game. Deploy it to kill or cripple villain characters; otherwise, you’re better off using the cards themselves.
Truth Seeker is useful in very specific circumstances—generally, you’re better off using Bring What You Need for drawing, then powering more Forms for damage. Sometimes, though, it's more helpful to do two things acceptably than one thing well; thus, this card.
Offensive Transmutation does something that other heroes can do more easily, but it’s nice to have it nonetheless; there will be slow moments where The Scholar’s biggest contribution is just standing there and taking the hits, and cards like this let him provide some additional utility. Slap it on whatever's likely to do the most damage in the next round (or whatever'll do damage in a way that The Scholar can't tank), and it'll give the heroes some useful breathing room. Villains who do most of their damage personally (like Spite) are especially vulnerable to cards like this one.
“Get Out of the Way!” is a key part of the using the counterpunching strategy against minion-based villains; combining it with Mortal Form to Energy allows you to catch the villain and his minions coming and going.
POWER COUPLES
Legacy and the Scholar are OMG BFFs in a big, big way. Legacy’s Motivational Charge and Galvanize will elevate the counterpunching strategy from sustainable DPS to a non-stop beating, and presence of two beefy tanks will ensure that the other heroes rarely get hit.
Omnitron-X loves The Scholar. Why? Because The Scholar will nearly guarantee that Omnitron-X’s fragile Components never leave play; Omnitron-X is never gonna get close to 5 damage. Plus, Don’t Dismiss Anything lets Omnitron-X get set-up in half the time. (Similarly, Unity can play bots directly with Don't Dismiss Anything; her restriction only applies to her own play phase.) And The Scholar’s just fine with Omnitron—his Innervation Beam dovetails nicely with a counterpunching strategy. (With Omnitron X and Legacy together, The Scholar is conceivably putting out 4-6 damage per round automatically, without including his own plays and powers.)
Wraith and the Scholar only have one really great interaction, but it’s a killer: Smoke Bombs. If Scholar is the highest HP hero in the game and Smoke Bombs is in play, Flesh to Iron becomes an unstoppable forcefield. Even if he’s not the highest HP hero, judicious redirection of damage with Smoke Bombs will quickly equalize everyone’s HP, at which point The Scholar can heal back up and continue as above.
MISCELLANEOUS
The Scholar should really be the first hero to play. He responds well in the immediate aftermath of villain plays, either with damage cards like “Get Out of the Way!” and Grace Under Fire or with tanking cards like Alchemical Redirection and Expect the Worst. Moreover, other players will benefit from seeing the results of Don’t Dismiss Anything or Proverbs and Axioms in deciding what to do during their own turns. Similarly, it'll be helpful for them to know that they’ll be sheltering under an Alchemical Redirection or that a Flesh to Iron will stay in play until next round.
Drawing your second Don’t Dismiss Anything of the game sets you up for potentially vicious card engine. Repeatedly using one Don’t Dismiss Anything to place another Don’t Dismiss Anything on the top of your deck will essentially allow you to surrender your play phase indefinitely in exchange for giving everyone else a free card play every round. When deployed early in the game or when paired with setup-heavy heroes (Argent Adept, Unity, Omnitron-X), this combo will let the team come out swinging. The trade-off, however, is that you will be giving up everything else—no Proverbs and Axioms, no Alchemical Redirections, no mass card drawing, etc. Your draw phase will go towards keeping a single Form in play (preferably Flesh to Iron), and you will be effectively in stasis as you keep the engine running. If you’re going to run this engine, try to get Bring What You Need out before starting, then use your power phase to bank cards towards paying for Forms or an eventual Know When to Cut Loose.
Remember that Forms are not limited; you can stack them to augment their effects. Just remember that you have to pay for all of them—two Forms is generally the sustainable limit, either through card-drawing abilities or by skipping your turn to draw twice. You can put out more Forms in short bursts, but even with the Scholar’s various card-drawing powers, it’s unlikely that you’ll be able to sustain them for more than a round or two. (On the other hand, it’s generally better to get a Form out there and use it when you can; you’ll get more use out of that in the long run than in storing them up waiting for a card surplus that may never come.)