Juggling with close st. Fierce (HP) or cr. HP x short(LK) tatsu (hurricane), after EX Joudan, is one of the sickest, ambiguous set-ups. If done with full meter, a blocked/hit cr. forward (MK), or close st. MK/HP/MP x srk will bring the meter back to MAX and you’ll be able to cancel in to denjin*. But i think the HP x short tatsu is also good because you are put right next to your opponent for a free mixup (Ex. high/low/throw/back dash, etc.) and depending on what point you juggle the opponent with HP, the timing will change. You can get a timing where you have a few frames in advantage, or time it so you and your opponent land at the same time. To get used to the timing, go to parry training, (select Ryu SAIII and Ryu and set SA gauge to MAX) and set the dummy recording to hold up (for a continuous jump) after about a second of the timer has passed; that way, you have time to start off with an EX Joudan. Next, press start and select parry training. Do the EX Joudan, and juggle with HP x LK tatsu. Immediately after the tatsu, hold up on your controller to see if your character or the computer jumps first. The computer will jump as soon as it recovers, provided you held up long enough in the recording. Finally, adjust your timing of when you HP until your character jumps first.
*Note: You do need to add the LK whiffed tatsu in to have the right amount of meter to cancel into denjin if opponent blocks cr.MK/cl. st. MK x srk
Here are some other meter notes that may be helpful-
Blocked cr. MK, or close st. MK/MP/HP x srk xx denjin set-ups after finishing an EX Joudan with:
HK tatsu - will result in MAX meter allowing cancel into denjin
HP srk - will result in 99% meter, so no denjin will come out unless one meter building move is used before (ex. cr.MP)
HK Joudan - will result in 99% meter, " "
st. Fierce(HP)/st.Roundhouse (HK) - will result in 98% meter, " "
Meter gained from attacking (SAIII only):
Jab/short strong/forward fierce/roundhouse
Whiff 0% 2% 3%
block 1% 6% 10%
hit 2% 11% 18%
shoryuken: whiff-3% blocked-14% hit-20%
so, for example, a blocked crouching forward xx shoryuken will result in 20% meter gained.
another example could be if the crouching forward xx shoryuken hits, then 31% bar will be filled.
-44% meter is required to build 1st EX amount in SAIII, or 12 cr./st.MPs