consider making a sturdy base frame out of 3x2 that spreads all the weight of the
base of the bath and spreads it out evenly.
(rather than the flimsy metal legs that flex and put all weight on 5 very small contact points )
you may need to taper the wood frame to produce a fall to the waste if the bath is flat .
I've done this many times, particularly if there is an over bath shower fitted .
obviously after it's dried out and floor repaired .
then fill the bath with water to load it with weight, decent injection of silicone all round the edge (not a smear over the gap)
leave to set 24 hours before pulling the plug or thinking about decor/trim/tiles
unfortunately such work is not done and dusted in a day ,so buy a paddling pool to "soak your plumbs in" in the
back garden during the project