What should I do next?

What should I train next?

I have:

75 Attack
99 Strength
71 Defence
55 Prayer
68 Ranged
68 Magic
86 HP

 

[Tenko]

Magic defo. Get 94 for veng and ice barrage.

I heard plank making is good experience now.

 

[Determinate]

Prayer.

At least get it to 70 and finish the Knights training ground.