U2 is the best Ultra for Oni hands down because U1 is a fail source.
BnB / Combos, the ones I use is
1, Non counter hit, Ex slash , Hk Tatsu, U2 10hits if you are accurate but if you are a bit late you will get 9hits, if you are even later cool you just get punishment and wasted your Ultra. I can do it 90% of the time so can you guys. Here’s the deal many of you guys did not know what to do if you score a counter hit on slash, for me I do forward dash once and then follow up with HK Tatsu that will be the delayed timing to get 2hits from HK Tatsu into U2.
2, Ground punish hit comfirm strings cr.lk, (cr.lk os), cr.lp, cr.mk/stmp + fireball / lk slash “cr.lp to cr.mk or st.Mp is a 1framelink”. St.lp gives a +7 but wouldn’t hit crouching which I don’t really recommend.
3, Crossover combos, cr.lpx2 into anything you want, if you use Lk cross-ups if not you can use cr.lk~cr.lp, there is a space/gap which your opponent can dp after blocking Mk and depending on the height that you press you Mk.
Cr.lpx2 , cr.hp, lk slash whiffs on certain characters and sometimes the angle of your cross. Personally, What I prefer is back+mp/tc2 works on all characters just have to confirm whether they are crouching or standing for the extra hit.
4, Punish combos , st.Hp, lk slash, fadc, cr.Mp, b+Mp (standing opponent TC2), Hk tatsu or Ex Srk
5, Punish combos 2 , st Mp or TC1, lk slash, fadc, cr.Mp, cr.Hp, Hk tatsu or Ex Srk.
6, Frame trap/counter hit combos cr.Lk, cr.Lp, cr.Hp (counter hit because they mash tech throw), Ex Electric fireball , Mk Tatsu or ( Mk ground pound / U2 in the corner )
7, Air punish, Lk Tatsu, Mp.srk , Fadc , Mk ground pound or U2 (full animation since you land it while they are in the air).
8, Block string cr.lk x2or x3, st lk fireball or f+mk depending on size, the reason you want to do this is because you do not want any DP mashing or backdashing in between your strings (true block strings) although st.Lk into fireball might need to loosen up the space but it is all instinct to me.
9, Full animation U2 + 2meter, cr Mp, cr Mk, fireball (any version , I use lp tho) , fadc , U2. There are many variation to this fireball combo I leave this to your imagination. The key to this is distance.
10, Finally my favorite 940stun combo if you land a jump in with a full meter, Jump in Hp, st Hp, lk slash, fadc, cr Hp, lk slash, fadc, cr Mp, cr Hp, Hk Tatsu or reset with Hk slash for a 100% stun. forgotten about the damage should be around 450~500+ damage.
Enjoy~