Since the events cycle is a little messed up because of the christmas events of the past week, rebate week could be show up on the week of January 4th, or even the week after that.

Since you don't have a lot of medium refines, stay with waiting for the rebate since 100 refines is to me a lot more than a weeks worth of free mount myoboku's gift and random prizes.

Best thing is jumping from level 5 to 8 , 4 to 8 and similar things to mke use of the additional wish credits we get during REAL refine rebates. Jumping one level at a time is not the best way to go. Do bulk jumps.

You understand that during a rebate you get wish credits once you level. After the rebate is over, the wish credits you gain from leveling from the event will disappear. So let's say you level an equipment from level 5 to 6, the rebate will give you 50 wish credits. Once the rebate is over those 50 wish credits will disappear.

It's better to do bulk jumps because of this reason as you'll more likely to level that one equipment to level 7 during the rebate week than spreading your refinement runes for multiple equipment and seeing the wish credits go to waste.

juve ..seeing the number of refins you have..you can try 6 to 9 in first position..6 to 7 is 100 mediums max..7 to 8 is 200 advanced but you will have a 50 additional wish credits so 150 max...for 8 to 9 its 500 but you get base wish credits of 100..so max case 400..but I have felt that when i have more refines than i need for a particular upgrade I get it with less refines( not proven, maybe i believe because i put it in auto upgrade and i dont count the exact refines i use, but i am sure i have been always lucky with bulk jumps, give me a lot more value for the refines i put)...But by the time of next rebate you will have more refines and you can decide as per the refines you have...Best thing is go 5 or 6 to 9 in first position in each rebate and later focus on second position. And when you are doing these jumps if you are not able to reach maximum rebate of 500 refines in this bulk jump , say you have used 469 refines and you reached 6 to 9, the split up the remainiing 31 in other equipments, use very little on each so that they dont level up, because you dont want to level up unless you c*e that bonus wish credits you get for leveling up.