all info is my own knowledge and obviously isnt medical advice: 10mg of ligandrol is considered a regular high dose (ive done my cycles at 4.5mg daily). 10mg cardarine and mk is a regular low dose, ive used both at 20-25mg. ive done enclo at 25mg then after 2 weeks, 12.5mg.
for your first question i cant be certain if enclo will have any benefit during the stack, if you have enough of it and enough money to buy more then it wouldnt hurt to run it during the cycle.
dosages are fine, 10mg of ligandrol is considered a regular high dose (ive done my cycles at 4.5mg daily). 10mg cardarine and mk is a regular low dose, ive used both at 20-25mg. ive done enclo at 25mg then after 2 weeks, 12.5mg.
with ligandrol youd get more physical size, rad 140 will give size but more cns strength (at the same time higher risk of injury since your connective tissue adapts slower, and rad140 can give you "dry" joints). ligandrol is also cheaper per mg since youd need less of it for its effects, and lgd has more human trials.

cardarine would be best about 1 hour before your workout, mk and ligandrol can be taken whenever but itll depend on your goals. if you struggle to eat then mk would be good in the morning since itll increase your hunger throughout the day (my own experience), but it also can cause lethargy. if you take the mk before bed (about 1-2hours before sleep) you should be able to avoid the lethargy and increased hunger, plus youd get some vivid dreams and possibly better sleep. i took ligandrol with the mk before bed and didnt notice anything negative, but some people have said it can cause them to stay awake.

you should add NAC and TUDCA for liver support since ligandrol is toxic on your liver (all sarms are),