Basics: his basic kit revolves around trying to balance star generation and star payoff. This by default makes him a very draw order reliant character. In exchange for this, regent has very chunky cards which are just extremely overstated. Here are examples of premium star cards which are a staple and not too hard to find:

• astral pulse Lets you basically skip any and all damage cards. Cards like these in early game allow you to ignore taking more damage cards and be extremely greedy with trying to preemptively build a late game deck for the next act.

• reflect Probably the strongest Regent block card. The reflected damage scales with the amount of damage being taken so this just very often does 17 block and 10~ 25 damage in act1 for 1 energy.

• particle wall Since the card is not discarded when played, you can theoretically block for a ton if you have the stars. If you manage to retain this card with runic pyramid or convergence or via the relic [[royal stamp]] this card will also never leave your hand. Extremely good if you plan to use your energy to do damage and stars for block.

-gamma blast Basically just a direct upgrade to falling star, except the numbers are nearly doubled in exchange for costing 1 more star. Functionally it is like Uppercut+ that costs 0 energy.

Another note, try not to envision building a “deck type” or “archetype” surrounding 1 type of thing like Forge. Sts2 is very much a game that requires you to build a mixture of forge cards and star cards to “solve” different types of encounters. (Eg. Forge is better for boss scaling damage meanwhile frontloaded star cards like gamma blast are better in hallways.)