Alright, this section will be more difficult than anticipated, but I'll give it my best shot.
The key to successful combinations is a fight is making sure each jutsu/component of a move supplements the last, so the other jutsu isn't easily countered and the whole move falls apart. When you make a move, you have to try your hardest to push your opponent in a corner, limit the way he can counter and from that you can control the pace of the fight. Once you achieve this, you can predict possible counters he will make and from that you can map out vague plans to pursue if they use one of the counters you predicted. Its a fairly complex process, but when you get it, you really get it xD.
I'll start with basic examples to put this into context.
1) Gushing Water Imprisonment ? This jutsu materializes a prison of dense water around the opponent, trapping them in a sphere of water and preventing their mobility.
Common counters include:
-Using the wind stream technique to jump and "fly" away from the water as it constructs itself
-Using the hardening technique to make a sturdy armour of rock and stones which can extend stone spikes from itself to "burst" the water prison
-Using the Super added weight technique on the water directly to "petrify" it and reduce it to dust. This counter isn't accepted by everyone so I don't recommend using it.
With these three main counters in mind, look at the nature of your opponent. Do they strike you as someone who will use the hardening technique or the Super Added Weight technique, or are they just the type of person to use Hurricane Fist/Wind Stream technique ?
If the latter, you need a way of trapping them before they fully escape. While trapping them you still need to stack on the pressure, meaning you're narrowed down to a few canon jutsus.
Personally, I'd go with the A-Rank Great Flame pillars technique which sends three tall pillars of fire out of the ground, one beneath the dome of water and the other two "behind" the opponent, causing them to crash into the fire pillars if they decide to move backwards with the Wind stream technique or Hurricane Fist.
So my move would be: Gushing Water Imprisonment --> Great Flame Pillars Technique ---> Whatever 3rd jutsu (Optional)
Are you guys starting to get the idea of this kind of thing ? Do you have any questions ? and should I move onto the next example ?