MILD is a technique in which you repeat a mantra to induce a DILD, and a DILD is where you become lucid within the dream.
HI induction technique? You mean WILD? The one where you go from waking to dreaming without losing yourself?

Anyway, what you should try depends, do you get SP/HH often? If not, I would go for DILD, and improving recall is a great advance, I mean, without recall even if you get lucid, what if you forget?

Also, for a DILD it is recomended to do reality checks.