the difference between L20 and 45 is most certainly not sufficient enough to overcome a huge head start with a fairly simple kingdom.
Just use some zaps!
For this thought experiment, it might be helpful to assume that the novices are playing pure BM until they buy their helper.
The problem is, of course, that pure BM is often much, much better than what a true novice would end up doing. Beginners often love actions, and the concept of terminal clashing probably sounds like a new sci-fi movie title to them. I remember games buying 10+ terminals with no villages on board. Drawing hands of Moneylender, Moat, Remodel, Mine, and Baron. Sometimes the actions in the kingdom support pure action engines, but beginners will often find a way to bugger that up, too. For example:
A novice simulatorExamining the board: Take 3-5 random kingdom cards, and rank them in terms of "shininess": A>B>C>D. Higher cost shiny cards are always shinier than lower cost ones. Villages and other +Action +Card cards automatically get double shininess points (i.e. at least twice the chance of making the ranked shiny cards). Big effects like Possession and Expand get triple shininess points. Sick combos (like Village-Smithy) get special bonus shiny points. Cards with a lot of text and/or dealing with trashing get half shininess points. Obviously trashing is useful when you have curses, but otherwise all cards help you, you know!
1) When possible, buy shiny card A. If not enough coin, buy B, C, and so forth.
2) If there's no shiny card at $3, buy Silver with $3. Can't waste money, after all.
3) If you get $6, flip a coin. Heads, buy shiny card A. Tails, buy a Gold. Gold is good, and somewhat shiny.
4) If you get $2 and there are no shiny cards at $2, buy any random $2 Kingdom card. If there's no kingdom card to buy, buy an Estate. It's only one VP, but it could be the difference!
5) If you get $1 or less, flip a coin. Heads, buy Copper. Tails, look at the kingdom, scratch your head, and pass, forgetting that Copper costs $0.
6) If you have "too much" (this is defined as having some random arbitrary amount) of shiny card A, buy shiny card B instead even if you have enough coin for A. Same logic applies to B if you have "too much" of it. Gotta have balance, after all.
7) If you get $8+ and have a single Buy, buy a Province. Even newbies know that much.
8 ) If you get $8+ and have multiple Buys, flip a coin. Heads, buy a Province. Tails, spread the love between shiny cards A & B, if possible.
9) If your opponent has started buying Duchies, buy a Duchy with exactly $5. Still buy Gold or shiny card A/B/C with $6 or $7.
10) When your opponent ends the game with Provinces or piles, be surprised and tell them that you just needed "one more turn".
I remember a little too well.