Hi Klaw- sorry to hear about your client, she must be disappointed and worried .
Fistly, if she was sent to hospital for a fast HR, the hosp should really have done a CTG, especially as she had a previous c/s.
Remember that the normal FHR is 110-160, so even though a baseline of 155 seems really fast, its still at the upper levels of 'normal' and if it was listened to during an accelerative period, it can be a good deal faster.
It would be worth getting a scan to give an estimated fetal weight, and although this is not 100% accurate, it would give an indication of size compared to last time.
Induction is tricky with prev c/s also, cant use PGE, as it works to soften the scar as well as the cx, cant comment on the propess as I have never seen it used. I have however used Atad catheter and +/- gentle synto with prev c/s patients (just google it) with quite a bit of success. Again, dont know if your hospital has used this.
I suppose a lot depends on why she had her last c/s, was it for breech, failed IOL, CPD....etc?
If she dilated well but had fetal distress, there is no reason not to go for it, but if she did not dilate or baby did not descend, I would probably not push IOL too much, as it will be quite long, tramatic and low chance of success.
If the head is high, she is small and the baby is big, and she is likely to be traumatised by a lengthy IOL with probable CFM and epidural and a high chance of a c/s again at the end of it, I would probably advise her to go with an el C/S, which is much less traumatic for her, but she might well have feelings of guilt and disappointment due to this.
The alternative, of course, is to have a CTG and if it is ok then wait for labour to start as it doesnt really sound as if there is any desperate reason to do anything in a hurry, although it sounds like the hospital will try to talk her out of this option. Bear in mind that generally, obstetricians are not very supportive of HB in low risk women, let alone prev c/s, and this could just be a convenient excuse to get her into hospital.
Sorry that this is a bit rambling and long,and it is only my opinion. Whatever she decides to do, I hope it goes well for her.