The design for alliance colloseum is terrible
- the points needed to gain levels is too high
- the points earned for actually doing a fight is too low
- the nodes and champ restrictions are too limiting
- and it's way too grindy and time consuming and overall very boring unless your a spender and buy the levels to reach targets somewhat quicker.
With the solo colloseum you have got it just about right so why can't the alliance version be similar and more engaging.
The rewards on offer for the alliance version and time required to gain them are not worth it, so I will enjoy a weeks break from this boring event.