Here's just a checklist that you c*e to increase power since I don't know what you have or haven't done

500+ Power boosters:

- Upgrade your tactics (From your SS you only have lvl 2 Ghost kill), for your level you want at least level 4 and if possible level 5.

- Ninja tools!!! Make sure you are doing the hardest TI for your power (For you, Brother's Easy), ask for help to clear the TI as the tools you get will dramatically increase your power. (Side tip, make sure you do your friendship TI's too)

- Ninja tools (Pt.2) Upgrade your tools to around level 14, or whenever you can't upgrade one with all 6 slots filled and then you can start reforging them (Guide here). Also to make sure to match Nature stones (Red-Red, Green-Green, etc.). If done properly, this can add a good few thousand extra power

- Mt. Myoboku Cultivation, Great way to increase your power quickly

- Summons Cultivation, this is probably one of the most left out ways to get power, once you obtain a sizable amount of summon,s keep on cultivating them. Their stats add up and will provide a decent power boost. When doing these, prioritize the cheaper ones first in order to unlock the next cultivation level.

- Upgrading your equipment!!! This is a must since you are already level 82 and don't have any Super Kage gear, this is probably the one of the only things that would give you an edge over level freezers as they cannot access the higher tier armor without doing instances/ninja exam. Make sure you are grinding for materials on weekends since you have already max awakened. If can't beat the higher ninja exams, you can look them on Youtube for help.

- Battle Armor Clothing, this one is a little less important and you shouldn't focus so much on this but once you finish everything else and have spare coupons, you can start investing into battle clothings.

200+ Power Boosters:

- Treasured Tools, this doesn't add an insane amount of power, but the secondary stats the tools give are essential. Make sure you level up your traits (Under the beset tab) as they are more essential than leveling up the tools themselves.

- Battle Armor/Rank, make sure you save up your armor/threads until rebates, (Rebates are super important for f2p players)

- Strengthening Equipment, this directly correlates to upgrading equipment. (Better equipment = more stats gained during strengthening) so make sure to do both and not neglect either one.

- Charms, this one is a bit iffy and if you would like more detail, check out this guide. Before doing anything though, don't just upgrade your charms whenever! Wait until the charm rebate comes around and then spend all your charms during this time (Very important). After the event, start saving up your charms again. As for the charms themselves, just try to get all your equipment to level 3 first so u can equip Rainbow magatamas. After that focus on your Pos1 ninja.

- Refine, again this one gives a lot of power but how you should do it is subjective. Essentially though, you should have at least level 4 refines (Bare minimum). Once you do that, you should start saving up medium refine runes to use during the Refine Rebate. Make sure you are saving Adv. Refines during this time as well. (You'll need a few thousand Adv. Runes). For more information, check out this guide.

- Purification, make sure that you first have a basic layer of purification, with a few blues and such. You should focus on Initiative/Critical/Injury during purification, however in your case, you should focus on combo for Minato. He is one of the rare exceptions where combo is actually important. After you have a basic layer of purification, you c*e this guide for further help.

- Rune Stones! This one is pretty major and can give a ton of power. First of all, save your cave keys for rebate, like pretty much everything that has a rebate. You'll want around 500 keys for the rebate but if you can't reach that, its fine. When there is a rebate though, pull until you can reach a checkpoint. If you can't reach a checkpoint, just continue saving. (Also if you want to reach max rebate prize, I believe you need around ~2050-2550 keys, not sure). As for equipping your rune stones, try to have at least level 3 rune stones on all your ninjas and focus the rest on your Pos1. After you get Pos1 to all level 6, you can increase the other rune stones to level 4.

- Summon Runes, This is a great way to earn tons of power very easily. Again, make sure you only draw 10 from summon and do it during the rebate event. Don't buy the summons runes from the summon shop btw. You should save the coins for summons you'll need later (Like Kirin or KoH). There's not really a pattern you need to upgrade summon runes as they don't correlate to position so just try to spread out your runes evenly across the three summons.

- Guild Summons, this power source is a bit tricky as it is expensive to maintain and doesn't give much power, and at the same time you can't control how much the summons are being fed, but this does increase power ~400-800 depending on your summon level.

< 100 Power Boosters:

- Magatamas, the power gain from this can vary greatly but by themselves they don't give an incredible amount of power. However, as the charm buff is based off of magatama and rune stones, you should make the effort to focus magatama on your Pos1 and keep the rest at least level 4 if not 5. The best way to get magatamas is through the lucky board event, You should save up your coupons for lucky board, during lucky board, you c*so buy optional refine rune packs which are great.

- Rainbow magatama, You should keep this to atleast level 3 in all your slots but doesn't give a significant amount of power.

- Eight Gates, this function gives some power but to be honest, its not all that great. Here's the guide if you want to learn more.

< 10 Power boosters:

- Breakthrough Pills, you really don't need to worry about this until much much later.

- Character Advancement (The Stars that you can open after you get a certain amount of shurikans),

- Summon level, equip gold summons in your inactive slots, they add a tiny amount of power but is better than nothing. (You have 3 slots for summons, equip the one u need and then the other two should be gold)

Tl;dr (Dang this was a lot longer than I had thought XD): Just click this *on:

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Also, save your items for rebates and save your coupons for lucky board

Credits to ICE* and MidnightSun for the guides!

If you want to check out the full list of guides: link