We can't aggro them down, so KOing their Characters and weakening their aggression is the main goal
The first thing that came to mind when I saw this card is how easy it is to hold up mana and use this to grab a powerful land such as Gaeas Cradle at instant speed before your turn
For collecting, generally yes: Japanese boxes release first and carry the JP-only Manga Rare and God Pack tiers, and Japanese sealed has the stronger track record (OP-13: ~6,000 launch to ~27,000 in about a year historical, not a guarantee)
The era of modern trading card games (TCGs) was in its nascent stage, with Magic the Gathering released by Wizards of the Coast just two years prior in 1993, and the Pokmon video games, which the prototypes visuals were based on, were in the final stages of development
This slot will be a 50% split between having the global Mystical Archive style and the Japanese variant
Taking into account the mana cost, method of preparation, and potential impact on a game, it feels fair to place Emeritus of Truce in the middle of the pack