Quick answer
Record the fusion label and level before and after a session, plus the activity you observed, without inferring an XP rate.
Leveling is confirmed as a feature, but no reliable Roblox XP model, cap, scaling rule, cost table, or fastest route is available.
For animash roblox leveling guide, keep dated observations separate when updates may have changed progression behavior.
Official evidence confirms leveling exists. Use the personal progress tracker while XP requirements, the level cap, scaling, costs, and fastest method remain unavailable; do not turn one session into a speed claim.