[This post assumes the plan is to give a flat number of orders to everybody, rather than return exactly what people lost]
Compensation should be gems or ideally an additional day of the war.
Earning more orders than your opponents, and blocking them from getting orders/ getting them to waste orders is THE key strategy of GW. The outage burnt a different number of orders for different folks, and prevented active-for-reset guilds from capturing order nodes to increase their advantage for the next day.
Giving out a flat number of orders entirely undermines how the war works - “winning” guilds will get shafted because they lost more orders, and get shafted more by their competition getting new orders to weaken their control of the map.
Just give gems! People can buy orders with gems, or choose not to and use the gems to make up for other lost rewards.