Astute

Having or showing an ability to accurately asses situations or people and turn this to one's advantage

Formidable

Inspiring fear or respect through being impressively large, powerful, intense, or capable

Indefatigable

persisting tirelessly

profound

having or showing great knowledge or insight

judicious

having or done with good judgement or sense

alleviate

make less severe

meticulous

showing great attention to detail, careful and precise

untenable

not able to be maintained or defended against attack or objection

resilient

able to withstand or recover quickly from difficult conditions

tenacious

tending to keep a firm hold of something, clinging or adhering closely