You’re talking about playing Ultimas as Boosters. That basically means 1 loop only.
Ultimas are special. They are, in general, situational.
It makes sense to tie your use of them to situations.
What does this mean?
Use your Ultima booster the way you would use cologne (if you use cologne). Or the way you’d use clothing.
Cologne
You’re finally taking an attractive woman you’ve been talking to out to dinner. She’s commented to you in the past that she likes the way you smell with a particular cologne. You decide to put some on for the date.
When do you put it on?
You also have three other colognes. She’ll probably like them too.
How many will you put on before the date?
Clothes
You pride yourself on having the right uniform for the job.
Swimming? You have Olympic-grade Speedos.
Scuba diving? You’ve invested in PADI-grade scuba equipment.
Rock climbing? Your gear is impeccable.
Formal event? You’ve got a bespoke Savile Row tuxedo.
So, how many of these outfits should you wear at the same time? And how do you know when to wear each one?
Ultimas
If you’re using your Ultima as a booster, take the same approach as you would with the situations above.
If that’s too metaphorical, don’t freak out. Just let me know and I’ll put it in more literal terms.