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Seventy two words put P first and R third, and no vowel can safely be ruled out of the second box.
A takes the second box in twenty six of the seventy two, thirty six percent, with O on fourteen, U on thirteen and E on twelve. Y adds five more and I takes two.
So every vowel plus Y is live. On a page of seventy two that makes the second box a poor first target, even though A leads it comfortably.
PARED, PARER and PARES differ only at the end. PARKY and PARKS do the same, as do PARTI, PARTY and PARTS, and PARDI, PARDY and PARDS. The A branch is mostly one stem taking whatever ending is going.
S closes twenty of the seventy two, twenty eight percent, and Y another thirteen. Between them they take thirty three of the page.
E leads the fourth box on thirteen words, with I, K and T on seven each. Only six words repeat a letter, so a visible double is worth acting on immediately.
They differ in a single box and both are common, so as a pair they waste a turn. Take one and spend the other on PARTY or PURSE.
In lowercase it is a glassware term carried by word game dictionaries. It is one of five words here with Y in the second box.
It holds twenty six words and most of them come off the PAR stem, so a guess inside it usually confirms three letters you already suspected.