The loser of the match could still advance to a quarter-final against New Zealand in Wellington depending on the outcome of the West Indies-UAE game earlier in Napier.
The 1992 champions had been woeful in their first two matches and then limped to a tense 20-run victory over Zimbabwe before they accounted for a stubborn UAE side by 129 runs.
Those two victories built their confidence to a point where they were able to beat pre-tournament favourites South Africa by 29 runs on the Duckworth/Lewis method in a rain-effected match at Eden Park last Saturday.
"We were playing against two tougher oppositions up front just at the start of the tournament and they played better cricket than us," Misbah said of their successive losses to India and West Indies.
"Then after that we got, you could say, weaker sides, and we just got our momentum back and got our confidence back.
"When you are against tougher sides at the start sometimes (you) lose your confidence and momentum. But as we get back into a winning situation, the confidence and momentum is back."
The Pakistani captain felt his trio of pace bowlers, Wahab Riaz, Sohail Khan and Mohammad Irfan had kept his side in the tournament.
They have combined for 28 of the 38 wickets his side have taken and UAE captain Mohammad Tauqir said his team felt they were as good as South Africa's attack of Vernon Philander, Morne Morkel and Dale Steyn.
"The pacers are really bowling well," Misbah added.
"All of them are wicket-takers, aggressive bowlers. And that's what we need if we are not batting well.
"All the pacers are really doing their job getting wickets, putting pressure on the opposition."
Misbah will need them to exert that pressure on Ireland to ensure they do not suffer the same fate as the side who were knocked out of the 2007 World Cup when they lost their clash in Kingston by three wickets.
"No doubt Ireland is a dangerous team (but) ...it is 2015, so we are not looking back to that," he said when asked of the 2007 loss.
"We are focusing on tomorrow's game, that's it, and that is a must-win game for us."
(Reporting by Greg Stutchbury in Wellington; Editing by John O'Brien)
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