Collocations for crucial - adj.

be, prove, seem
become
remain
consider sth, deem sth, regard sth as, see sth as

really, very
absolutely
It's absolutely crucial that we get this right.

fairly (esp. BrE), pretty, quite
clearly, obviously

for
The talks are crucial for the success of the plan.

to
Secrecy is crucial to this police operation.

Crucial is used with these nouns:
aspect, breakthrough, component, decision, detail, difference, dimension, distinction, element, evidence, factor, feature, function, implication, importance, influence, information, ingredient, insight, issue, link, match, meeting, moment, part, period, phase, point, question, respect, role, save, stage, step, task, test, thing, turning point, victory, vote, witness