I have some good ones:
They are mostly based on my current team Haggar(y)/Wesker(b)/Thor(a), but these might work with similar assists.
-Do a block string of any air move, c.:l:, Lariat. When Lariat is over, HAGGER BUSTER
This is silly, but it does work in corner, and midscreen if there’s no advancing guard. Have to check frame data for further info. If Lariat hits, connect with any lv1 Hyper.
-Any combo to :l:Violent Axe, :l:,
, :l:Violent Axe, dash/wavedash under, HAGGER BUSTER or mixup
Have to test this more and see the recovery properties of the opponent. This is good, but it is jumpable. Before the dash, you can use an assist to pin the opponent down and mixup in several ways:
With Thor’s Mighty Spark assist:
-(Spark on ground/air hit) Ground pipe or :s: and combo
-(Spark on air guard) wait, jump and Backdrop or timed :h: Hoodlum and combo
-(Spark whiff on ground crouch block)
Hoodlum, Pile Driver or HAGGER BUSTER
-Any combo to AMS, OTG assist, dash/wavedash/wait, HAGGER BUSTER or mixup
This is good on corner, especially with flashy OTG assists. In Wesker’s case, recovery occurs really low to the ground, so, you can wait for the landing, or air pipe in case of recovering up
-Any throw, assist, c.:h: ghetto roll crossup, HAGGER BUSTER
This only work with deceivable assists, such as Thor’s Mighty Spark, which whiffs on low block. If Haggar is near the blocking opponent, you can HAGGER BUSTER immediately, even if the Spark hit frames are in the screen. Still don’t know if Spark hit big chars like Sentinel on crouch… You can time it to work after Wild Swing as well, but watch the roll recovery.
-(On hit or block) :l: or c.:l:, :h: or c.:h: or Ground Pipe ~ kara cancel HAGGER BUSTER
This is just awesome! You have to be really close though. Pushblock attempts will be punished, standing around will be punished, most reversal hypers will be punished! Off the three :h: attacks, c.:h: gives the most range, but Ground Pipe is by far the best to use, due to kara timing and the deceivable animation. You can use standing :l: and
similar animations to punish or pin down jumpers and mixup with various things. Use it to kill Phoenix 
Still have to check the frame data to put more variables and see what can both players do