By Skill Level it can be the sum of Geomancy Skill and Handbell Skill combined or just Geomancy Skill alone. As long as the total is within the range shown on the table, that's what determines the potency of (Indi,Geo)-Refresh.
Examples:
Geo-Skill 373 alone = 3 mp/tick
Both Skills 350 + 265 = 615 = 4 mp/tick
The potencies higher then "3 Mp/tick" will need additional help to reach. Handbell use will be needed, and as result, only Geomancer main can obtain it.
Because one cannot use handbells and the level is capped at 49, with geomancer as a sub job, the most anyone one can get is 1 Mp/tick, even with full merits on geomancy skill.
Yes, if you can reach "skill level 900" or higher, one could get 6 Mp/tick. But as it stands, even with full merits on both magic skills and the use of known equipment, the highest anyone can get in total Skill level is 813, making it unable to get.
