I read in the newspaper Ireland team scouted Bangladesh yesterday, so probably they would have worked out one or two tactics against Bangladesh. Instead of changing the team its time to change the tactics,
If Bangladesh bat first:
Get 90 runs in the first 15 overs, milk the bowling from 16to 40 overs score at least 115~125 runs, then go berserk at the last 10 overs probably score 100 runs. Then open with spinners since Ireland practice on seaming wickets they will find it difficult to face the spinners.
If Bangladesh bowl first:
Open with spinners and go with full spin attack ,clean up the lower order using spin or pace contain them within 200 or 220
Tamim batted really well yesterday, he should be doing samething that try to stick around till the end, other batsmen should give Bangladesh blazing start and reach the target within 35 ~40 overs, thereby can offset the negative Run Rate.