I'm not an expert by any means, but I would have another session working it, with the aim to do a 3/4 ish link to the top, i.e from below the crux, through it, to finish. If this feels OK then you have the confidence boost that you only have to link a few moves into what you've already done. Plus you have experience of doing the top when tired. Also, another session looking for tweaks to your sequence can make all the difference - whether to skip clips, do a move static or slap, when to move fast when to move slow, that sort of thing. This can be done while warming up, going bolt to bolt.