1. Muscle Restriction SealNo worries.
To answer your question regarding Living Barrier, I'm inclined to say that the blades need to remain crossed, similar to how you have to sustain MIE by keeping your hands to the ground and continuously fuel it. However, because it has a two turn limit, it doesn't seem that you have to do keep the blades crossed due to the restriction requiring you to be withing close range to sustain it's effects. It was technique used in a video game I didn't play so I haven't seen what it actually looks like. I'm gonna go with you don't need to keep the blades crossed after the initial activation.
For the Contract Seal you just need to physically touch the summoning after obtaining the opponent's blood. It works on all summoning, even personal ones.
Last set of A ranks.
( Suji Haji Fūin ) - Muscle Restriction Seal
Chakra Cost: 30
Damage Points: N/A
Description: A special fuuinjutsu utilized by taking a tag that bears the symbol for "Restrict". When placed upon the opponent it generates an electrical current that is not physically harmful. However this flows through the nervous system and restricts the movement of muscles. This slows down the opponent and prevents him from using A-rank Tai and above for three turns.
Note: If applied by a medical ninja with sealing mastery, the effect will last until released.
( Shishienjin ) - Four Violet Flames Battle Encampment
Chakra Cost: 30 (-10 per turn to sustain)
Damage Points: N/A ( 60 if the opponent makes physical contact with the barrier )
Description: This technique requires four people or clones to use. The people must be standing forming a square, they will then make the snake handseal and clasp their hands. A barrier forms around them on all sides, stopping anyone from outside from coming into the square. If they touch the walls, they will be burnt by violet flames. The casters can add a secondary barrier outside to prevent them from being attacked by enemies on the outside of the square; although by doing so, they are unable to attack as well. Each barrier can sustain any A-Rank technique.
Note: Requires 4 ninjas or 4 clones to use.
( Fuuinjutsu: Bunshin Torappu ) - Sealing Arts: Clone Trap
Description: When an opponents is prepared to land a physical blow, the user quickly creates an earth clone to take the hit instead. The earth clone will then revert back to mud, which uniquely hardens to restrain the opponent's limb as the rest of their body is spread with cursed seals. However, it can be overcome if the user expels an S rank chakra surge.
Would've been cooler if it actually restricted the muscles to the point where the opponent can't move.
2. Four Violet Flames Battle Encampment
"This technique requires four people or clones to use. The people must be standing forming a square"
See this right here is already a problem for me, I do not see myself using this in battle just because of the setup process, although it is a cool barrier.
3. Sealing Arts: Clone Trap
Basically the user substitutes themselves with an earthen clone that not only hardens to restrict the opponent but also does damage through cursed seals.