The High Elves Resolve / Divine deck focuses on three commons with powerful auras (called laws) that affect other commons (including enemies), making it very important to consider where every common is on the battlefield. This is a faction with a high focus on controlling space, keeping your laws around and taking advantage of them while denying your opponent the opportunity to do so.
High Elves is a versatile faction with mid-range focus, yet capable of both long-range fighting and brawling at melee range, but preferring to keep the flexibility to adjust and readjust the space between units to shape the battlefield with their laws.
Arbiter of Peace and Arbiter of War create a defensive and offensive law respectively, and friendly units covered by both become very unfairly efficient units, even more unfair when you heal them with the Attendant Priest and Cassia the Gentle.
These units can be boosted yet more with two events, Law of Loyalty and Law of Liberty. This is how High Elves win the economy war, by creating unfairly strong commons through their laws and positioning that favors them more than the opponent.
The High Elves are an extremely tactical faction with a hyperfocus on unit positioning. They have very specific tools for each job with a main plan based on Arbiter of Peace and Arbiter of War working together to generate overwhelming value. High Elves as a faction can fight at long range or close range as the game requires, but they need to be fighting at all times as they lack big combos to set up or economic tools to exploit. If your opponent is not suffering the war of attrition, some factions can set up big combos or an economy that will overwhelm the High Elves.
The first priority of the High Elves is to have at least one Arbiter of Peace and one Arbiter of War out and to keep them alive so the rest of your commons are very efficient. Most of your games will start bringing one of each out to create a ranged line of fire, and trying to have at least one Arbiter of Justice on the front line, thus making it very hard for the opponent commons to attack.
If the opponent comes at you with commons trying to take advantage of your auras, this is then where the summoner Valeria shines. A combat / support summoner that is especially strong at destroying commons, with the help of Oblige and Law of Sanctity, she can become the ultimate common killer.
One needs to be mindful when is the right time for Valeria to jump in and out to kill enemy commons. Until then, use Valeria as support as the extra movements she can give to friendly units is very valuable.
Even without Valeria, Arbiter of Justice can make it very hard for melee commons to sustain an offensive and the champion Titus the Devout can completely stall an overly aggressive enemy offensive.
While High Elves can be very aggressive when necessary and opportune using Valeria + Sanctity + gates and Arbiters of Justice supported by auras, they are not particularly fond of that strategy. As mentioned before they are a versatile faction which doesn’t have a particular tendency to aggression or defense, but rather a focus on managing and controlling space. The goal is to have their units in the perfect position to have friendly commons under positive auras and the enemy commons under their negative aura. If they manage that they can have significantly more efficient units than the other factions.
The High Elves' disadvantage is that if the game slows down, they don’t have a plan B. Their plan A is to fight and by that plan they will win or lose.
While their approach to the game is kind of linear, they have the tools to face the different threats that the other factions of Summoner Wars have to offer.
When playing High Elves, the correct position of the units and understanding where to move them is what will define your game results. Also knowing when to bring out each of the tools is very important as most of their tools are powerful yet offset by a backfire potential.
Because High Elves lack tricks or economy tools and have a strong focus on the tactical placement of the pieces from both sides, controlling space becomes fundamental, very much as if one were playing chess.
You could indeed say that High Elves are the closest to playing chess that a faction in Summoner Wars feels so far.
If you greatly enjoy thinking thoroughly about where common units should end the turn and thinking about your opponent’s position as well as yours, then High Elves is a faction that will promise a lot of fun.