Ok i will give tips for taming spine boi( hes my personal fav dino)

1. If you want a trap, craft 14 stone pillars and place them like this

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With the front ones 4 pillars tall the middle one 3 pillars tall and the back one 1 pillar tall. Or you can just find a cliff and shoot it there.

2. Tranq the spino(i reccomend you do hunt dilo quest it gives an ascendant or mastercraft bow)and bring at least 70 tranqs if you're using crossbow(by the way thats the amount for a 150)

3. Feed it prime fish meat and your narcotic of choice to keep it asleep.

4. Saddle it and there you go, a killing machine more versatile than the rex.

Extra facts:

Spinos can swim faster than megs.

Spinos get a hydration buff after touching a body of water(+25% movement speed, +10% damage and +10% stam)

Spinos have a bipedal mode where it gains 1.5x damage but reduces movement speed.