There were already a lot of ways when people were abusing their amount to win the event.
I am not going from "nobody borrows me gold". I have 48 gold blasters and a gold turtle, XII level, and can always ask my house to borrow many troops and go with them. I just don't want and it is my choice. I am proud to make 15 seconds in the current event with my own hardly earned way.
So going further: Lich players already resurrected a lot of gold troops in the Christmas event, and now I am sure they had a good time to get XV troops and put them in garrison as well.
Give me lvl XV gold mechs to my garrison and I will see how many of them will be killed during siege (if even one, I will applause).
In the previous honor event, while the whole map was occupied with 1 color, the house fed several chosen players with their Super Units (angels, steam bastions etc). Each was giving from 2000 to 5000 honor. Every duke and prince did it every 24 hours or even used a troop rush because now we have a lot of it in the shop.
These events are always about finding the most tricky way to win it without actual fair competition.
You say, lower and weaker players should get the chance to win - WHY?!
The definition of the competition is when the strongest, or fastest, or far-sighted wins.
The weaker and lower players should NOT win much stronger players by abusing game features that were given long ago for completely different goals.
For example, you can just take 2 troops with you to Void. Not all of your House. Just two of them.
And about Lich can't compete with speed challenges:
Recently was an event with prosperity competition, but I was in the middle of building my Castle (4-5 days remaining). So I didn't take part.
If you can't - then you just can't, and you don't participate.