In a similar vein to this and to the [Discipline]/Present/Demonology deck mentioned above, I’ve now played a number of games with [Finesse]/Present/Discipline, and I like the deck quite a bit. You have a pretty robust game plan at Tech 1, with Grave and the Discipline Tech 1 units being supplemented by the high quantity of interactive cards in the Neutral starter, and haste from Nimble Fencers. After getting an early advantage, you can often close out games with just Tech 1 and a Heroes’ Hall by either taking advantage of Geiger’s interactions with Rambasa Twin to build a beefy board or using Two-Step (+ Appel Stomp, sometimes). In addition to the known synergistic interactions with Rambasa Twins, Geiger also works really well with the virtuosos, as you can maxband Geiger for extra hasty damage, or you can Temporal Distortion a Fencer into a Star-Crossed Starlet, then replay the Fencer and attack with both for lots of hasty damage.
Because you already can get a lot of mileage out of the Nimble Fencers, Finesse Tech 2 is often a good choice. Present Tech 2 is as solid as ever, and Discipline Tech 2 is a situationally great choice, and even when you pick a different spec it can provide valuable TD targets.
Neutral starter is great for providing a decent quantity of inexpensive interaction while mitigating the multicolor penalty. Spell-wise, Finesse provides a sometimes excellent answer card in Discord, a powerful offensive tool in Two-Step, a sideways strategy in Harmony (it has decent support between MM, the starter spells, TD and Now!), and an ultimate that can just win the game if you have a board presence. Present provides the extremely flexible and abusable Temporal Distortion, as well as additional haste in Now! and an ultimate that lets you more than refill your hand, when you have plenty of cheap cards to play. In Discipline, Martial Mastery is very good at smoothing your draws and helping you make decisions, Reversal is a decent removal spell, and Versatile Style is a flexible answer to many different strategies.
Tech 3 kind of sucks though.