This is best held as a 1-mana card to protect your threats from removal
And the habits that help you to build it are not complicated: Describe the condition accurately, even when it costs you a grade, because an honest LP listing beats a disputed NM one
Secondly, you can use it to cycle artifacts in and out of the yard those with death or enter triggers, and those that affect all players on upkeeps
Although the scope of what Pre-War Formalwear can reanimate is on the lower end, there are so many powerful creatures with a mana value of three or less that you'll always have a target for it
The cheapest version of Timetwister available on Cardmarkets website is listed at just under 700
The issue is, six mana cards are hard to come by, even in Standard