West - 3 choices, pass, 2 or 3♦ weak or my preference 1♦ that meets the rule of 20 (HCPs + length of two longest suits) also remember if 6/4 bid more!!

If West opens 1♦, North passes

Then West has a choice of bid 1♥ or if you bid a jump to 2♥  as a weak 6 card suit, rather than stong 6 card suit.

Over 1♥ south can choose between 2♥ michaels showing 5+♠ s and 5+ in an unspecified minor or 2♠ (if 2♥ shows ♠s and ♦s (top 2 unbid suits) or 2♣ with the plan to bid ♠s to show hand shape perfectly.

Wests hand is looking good, so can bid 3♥ 

North with 9HCPs and 3 card support will bid 3♠ 

East with 6 cards will bid 4♥ s 

South never showed ♣s (6♣  makes) even though vulnerable will bid 4♠ s probably over pass. 

4♥ -2 is a good result for EW if  N/S do not bid to game.
 

Alternative
Over 1♦-p-1♥ -2♣
3♥-4♣-4♥
then south can bid 4♠ to show shape perfectly.
North will see a probable double fit (though Souths 4♠ may be only 4). For that reason North will probably bid 5♣. Few will find a route to 6♣.