I’m going to presume if you want to do the EWS trails in wicklow that your more enduro than xc.
Djouce probably has more than enough for 2 days (it’s virtually robin seymours back garden, trail pixie extraordinary), then quite close is Carrick mtn (~20 mins by car at glenealy) which has held quite a few gravity enduro series races (has some savage trails), which would be another day easy. After that all the other local stuff is more peak district type routes around glendalouhg or xc type stuff unless you get to the dublin end of the wicklow mtns.
Are you coming from Scotland? via troon? or holyhead/dublin?
I’m sure biking.ie (Niall is ridiculously good) will guide you on Djouce (I would expect carrick too) as they are based at the other end of Djouce in Ballinstoe (official mtb trails – does have a sweet “thinking mans Ae. descent down the back but it’s more xc really. I’m a xc mincer so pretty useless for leading gnarly dudes (and I don’t know all the enduro routes tbf) you might be able to hook up with a Madster – email the club via the webpage.
I have known people cycle from Bray to Djouce – there is a “plum” of an ascent over a hill/mtn ridge to traverse though, 2nd gear job in the car and I wouldn’t want to do it – I’d deffo bring cars to get around everywhere – it’s relatively rural ireland. Would also mean you can stay in somewhere a bit livelier than roundwood. Bray would be good and not too far away.