Unmatched: Battle of Legends, Volume Two

Yes — you must take exactly two actions each turn (you may not skip an action) and you may choose the same action twice. (Rulebook p.8)

Drawing during a Maneuver is mandatory; if your deck is empty your fighters become exhausted and, if you need to draw while exhausted, do not reshuffle — instead each of your fighters immediately takes 2 damage. (Rulebook p.9)

Yes — you may discard any card from your hand to BOOST movement (or other BOOSTable values) even if the card could no longer legally be played; when boosting ignore the discarded card's effect. (Rulebook p.10)

Resolve IMMEDIATELY effects first, then DURING COMBAT effects, then determine combat damage, then resolve AFTER COMBAT effects; if two effects would resolve at the same time, the defender's effect resolves before the attacker's. (Rulebook p.12)

AFTER COMBAT effects still resolve even if that fighter is defeated during the combat, as long as the defeat does not end the game; however, if a hero is reduced to zero health their controller immediately loses. (Rulebook pp.12, 14)

If a bonus attack is triggered it resolves as a new attack targeting the same defender even if they are no longer a valid target, but no bonus attack occurs if the defender was defeated during the first attack; cancelling the AFTER COMBAT effect (e.g., with Feint) also prevents the bonus attack. (Rulebook p.17)