Pain Six Paths is not readily available for F2P. The most F2P methods are Sakura's Gift rankings (region based), Sunflower Covenant and Ino's Flowers with stamina (server / server merge based).

Don't recommend going for him as a F2P, he's super expensive coupon wise and the above methods require timing or outbidding others. When he's available for coupons in things like Carnival Celebration Capsules, he's going to be 10-20k coupons minimum per fragment.

20k a frag? Very expensive indeed. Do you know how much the Shisui Susano fragment costs in Carnival Celebration Capsules?

Rough estimate is about 800 per fragment for a good average. Can be lower or higher depending on your board.

Wait a minute. Are you saying that each Shisui Susano frag in the capsules costs 800 coupons? But it would still be quite expensive to get 180 fragments being f2p, so I think it's out of the question for me to spend almost 130k in coupons for a single ninja.

Approximately, if you get a good board. That's fairly "low" considering he was 1k ingots per fragment for recharge for a long time and still hovers around that price when purchased flat (for ingots).

Plenty have done it but for most, that amount of saving is a long time and they would prefer someone like Obito Uchiha [Rage Mode] who many have gotten four star skillbroken for ~35k coupons. Many do that via a Fuku Deals. Just note Obito's only usable at four star with his skill breakthrough, not at three star.

I understand, but I already have Obito full BT and I may have been one of the first to get him full in NY. But what other ninja can I get? I confess that I'm sick of Jiraiya + Orochi gnw, I rarely use other ninjas but just to try to differentiate. But in fact the best option is still Jiraiya, Obito and Orochi. But I feel the need to get a meta ninja, be it a Shisui Susano, Indra BT, Pain 3 Star or even a support like Kabuto gnw. The problem is that Oasis never brings better ninjas through coupons or in Fuku, and when they have a ninja it's incomplete or in Fuku 100k with horrible prizes.

The realistic answer that people often don't like is that because Shisui, Indra, Pain, etc. were originally or are high recharge cost units, they're not going to be readily available to be released to the average player immediately, or at a "reasonable" cost. Your most realistic course of action would be Shisui four star. Indra and Pain skillbreak just aren't viable unless you're a high spender (and have a higher power / init compared to your general opponent in the case of Indra).

The meta does get stale, which is understandable, but if you join the official Discord, there is a strategy channel there that can help you widen your horizons when playing Obito Rage Mode skillbreak. It's definitely understandable to me, I skillbroke Obito the night of his release 3/28/24 when servers opened, so if you did that as well in NY, you're probably tired of him like I am of other units due to boredom.

I'm really tired and bored of using only Obito and other units (even though I have a wide range of ninjas from my account except recharge ninjas) and I'm tired of always using the same ones. Maybe I create an expectation in the update of Naruto mecha's skills, that's why I went ahead and already got 4 stars, but I still don't know exactly what impact it will have on the game, I don't know if it will be at the level of Obito RG and if it will be in the meta

Mecha-Naruto very much is not, but even if it's not meta, find fun in playing around. Just know that "fun" vs "meta" may differ. But I genuinely suggest having fun, even if you lose.

I understand the difference between meta and fun. But I believe that Mecha Naruto will not be just any ninja, if used well it can be very useful beyond fun. And I found a short-term solution for the lack of available ninjas, I will invest in Han (tailed beast chakra) who is in the great plates, but since I don't have enough coupons I will have to wait until next month and wait for the Great plates prize to be repeated. I know he is not a meta ninja but he is very strong and broken.

F2P still can't get Susanoo Shisui with reasonable price, you think Oasis will give you character that currently owns him easily?

Yeah, no chance. Especially considering they made Rage Obito reasonably priced, for Oasis that means they do not need to give f2p anything useful till at least end of the year.