3. My idea of elo decay: if their elo is higher than 1600, decay is ~2%*(elo-1600) for each day after several days of inactivity. That'd be around 1 elo point per day for Wounder, for example.
No decay if their elo is lower than default.
1 elo is small isn't it? Means it would be smaller for people lower than Rank 1.