An instant matchpoint hand against two LOLs. What's your plan for rest of bidding?
Scoring: MP
P-P-1♦-1♠
2♥-2♠-4♥-4♠
P-P-5♦-?
P-P-1♦-1♠
2♥-2♠-4♥-4♠
P-P-5♦-?
Another instant matchpoint hand. What do you bid?
Other than vaguely trying to use the LOTT or bid with more shape defend with less, I'm never sure how I should be making these five level decisions (second one I guess is four level decision in sense).
EDITED TO CORRECT FIRST AUCTION

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P-P-1♦-1♠
2♥-2♠-4♥-4♠
P-P-5♦-?