In what context? You mean in competition? How can you test Ving Tsun in a street fight when you don't know anything about your attacker? If you wish to cover every single outcome you will be disappointed. Its not possible. Victory depends on too many things to think that your great VTBJJ will help you in real life. Maybe all you need is a powerful punch or maybe all you need is a cloaking device
. It really is stupid discussion.
IMO Ving Tsun is a pretty useless competition style. You can see this when you look at competitions when both participants are just trying to chain punch each others head off. When they realise that is not working they are already tired and it ends up in some sort of messy grabbing kick boxing farce. In competition both fighters are conditioned and prepared to fight. That already makes things hard. If it were me I would go and train specifically for the type of competition. In most cases specifically MMA because they train to be well rounded fighters. What is the point in mixing VT with anything???????
If you think a pak sau and a few chain punches will win in the Octagon you would be wrong. Many WC lineages don't even train to fight. They have some sort of BS Tai Chi soft yeilding woman arrogance thinking they can adapt their WC to anything. Soft touching arms forward and backwards around and around. It's nonsense. Any decent well conditioned fighter would destroy your average WC guy. Fact!
Now if you have somebody that is well conditioned. Has a strategy, timing, focus and precision. Can recognize and find chances. Has good striking power and courage then in the street VT is pretty useful. In an MMA bout where the other guy also has these attributes but can Box, Thai box, shoot fight, BJJ and just likes to kick butt you tell me who is more likely to win? The MMA guy? You may be right but what if the VT guy lands the first shot and knocks him clean out? What can he do then?
Too many variables. Practice one thing well and leave the rest to the dreamers................