Did the math on the Rift...
500 EXP per match on average, 800 EXP per Rift Fragment, 10 Rift Fragments per level 8000 EXP per Rift Tier = 16 matches per Tier. 70 total tiers x roughly 16 matches per tier = About 1120 matches to go from Rift Tier 1 to Rift Tier 70 Tome Level 1: 93 Total possible fragments (9.3 Tiers) Tome Level 4: 85 Total possible fragments. (8.5 Tiers) Assuming Tome Levels 2 & 3 also give a similar amount of Fragments: About an average of 88.5 Fragments per Tome Level 88.5 x4 = 354. So, again assuming Tome Levels 2 and 3 give a similar amount of fragments, completing ever tome challenge will net you 35.4 Tiers worth of Rift progress. 70 Tiers -35 = 35. So doing every challenge completes only half the rift.
TLDR: This means you still need to play about 560 matches to complete the rift, even if you actually complete EVERY single challenge.
The Rift closes in 68 days from now, so you would have to play about 8 matches a day, every single day.
So unless Tome Levels 2 & 3 give way, way, way more Rift Fragments than Tome Levels 1 & 4, you still need to do an absurd amount of grinding to complete the Rift.
Remember when they said they wanted the Rift to be completeable by average players? Lmao. Guess that was a lie, nobody is gonna finish this without paying unless they are a total addict.