Moon Knight is very good. A 3 health 2/2 for 2ER with an additional "cost" of doing the thing Tigra already wants to do, and he even stuns and confuses the minion to make it safer. In scenarios with mostly large minions he won't shine quite as much.

He REALLY wants you to focus on his enemy upgrades, which consequently drains your hand when you do (-1 for 0 cost, -2 for 1 cost), and EVEN MORE to Optic Blast. Which leaves you 2-3 cards to other stuff like play events or actually field precious allies. Of course, FIELD COMMANDER and RUBY QUARTZ VISOR are built to counter this, but (1) you may or may not draw them, (2) they take up precious rounds to build out if found mid-game and in solo, and (3) Field Commander doesn't stick with Villains.

In short... multiple resource generator options seem to be necessary when building him.

My attempt at a search for all possible attachments for Deathlok, some of these are just false positives, some of these require extra hoops to be usable on him, some other ones are campaign only.

If you have ways to refine it, please offer them.

Surprised nobody mentioned it in the 4 year old reviews, but Bug with Energy Spear is awesome in a deck that uses regular basic attacks. When I lean into this, I typically add a 4 pack of Cosmo, Bug, and 2 Energy Spears. If there was zero chance of knowing the encounter card due to the deck build / hero abilities in the 1 or 2 player game, then I would likely still run Bug+2 because I love having 3 piercing damage on tap every single turn.

Sentry is a card that has aged relatively well over the years. He generally becomes better as player count increases due to the fact that an extra encounter card is less likely to end the game with every player added. In multiplayer if your teammates have built around defeating side schemes/minions (Skilled Investigator, Overwatch, Even the Odds, Cable, Excess Damage/Minion Slaying Builds, etc) the extra encounter card can even work towards enabling their builds/combos. Not ideal for single player and requires some deck building and piloting considerations (allow some time for teammates to build out before playing in tougher scenarios).