I'm not sure that pooling will really do much for you other than make the total value seem larger.
For example, using your given numbers:
Investor 1: 100 tokens (1/6 share of the pool)
Investor 2: 500 tokens (5/6 share)
Total Pool Value: 600 tokens
Rate: 10% growth per unit of time
After one time period you now have a total of (600 * 1.1) 660 tokens. Lets run the next time period for the pool:
Pool Value: 660 * 1.1 = 726 tokens (66 tokens in growth rather than 60, nice compounding!)
Now your investors want to withdraw from the pool. Investor 1 gets 1/6 of the total (121 tokens) and Investor 2 takes the rest of the 5/6 share (605 tokens)
What if they just did it on their own, forget the pooling?
Investor 1: 100 tokens * 1.1 = 110
110 * 1.1 = 121 tokens
(in time period 2 only 11 tokens is growth over the previous 10. Not as interesting as the 6 token increase in growth from the pool)
Investor 2: 500 tokens * 1.1 = 550
550 * 1.1 = 605 tokens
(in time period 2 we get 55 tokens in growth instead of 50. A 5 token increase, still less than 6 though...)
But wait! In both scenarios, Investor 1 ends up with 121 tokens and Investor 2 ends up with 605. The total growth is the same!
In closing, the only real reason I can see to pool your tokens is to bypass a minimum initial investment requirement.
Also, kudos to @mhoran_psprep for pointing out the tax situation. It will surely be more complex in a pool than it would be to just do it on your own. I don't know about you, but I think that taxes are plenty complicated the way that it is, no need to spice things up with pooling crypto.