Explain one of this position, what you think is their strength and what is their weakness?
Mid Tribulation Premillenial.

Premillenial is a system of beliefs concerning the second coming of Christ happening before a millennium (1000 years) in which he will supposedly reign on earth.

The issues of the relationship of Christ’s return to the complex of events are known as the great tribulation. In theory, all premillennialists hold that there will be a great disturbance of seven years’ duration prior to Christ’s coming. There are two common view point that is whether there will be a separate coming to remove the Church from the world prior to the great tribulation, which is called as the “pre-tribulation” or whether the Church will go through the tribulation and be united with the Lord afterward, which is called the post-tribulation. The mediation between this two tribulation is known as the Mid-tribulation. “Erickson, Christian Theology, p.1217

Definition: "The Mid-Tribulational Rapture view holds that the Rapture of the church will occur at the midpoint of the seven years of Tribulation. In this view, only the last half of Daniel's seventieth week is Tribulation." Ryrie, Basic Theology, p. 497.

The Mid-Tribulation position is created due to difficulties in attaching the pre and post tribulation. There is three views about Mid-tribulation.

1. Midtribulationists believe that Christ will come for His people in the midpoint of the tribulation, exactly 3 1/2 years after it begins and 3 1/2 years before it ends when the Lord returns with His saints to set up the millenial kingdom.
Support for this position argues that--

i. The last trumpet of 1 COR.15:52 is the same as the 7th trumpet of REV.11:15, which sounds at the middle of the tribulation.

ii. The great tribulation is only the last half of Daniel's 70th 7-year period, and the Church is promised deliverance only from that in REV.11:2 and 12:6.

iii. The resurrection of the two great evangelists during the tribulation in REV.11:11 pictures the rapture of the church, with their resurrection at the middle of the tribulation after 1260 days (11:3).

2. The second position is on the partial-rapture view, there will be a series of raptures. Whenever a portion of believers are ready, they will be removed from earth.

3. The third mediating position is imminent post-tribulationism. It is said that while the return of Christ will not take place until after the tribulation, it can be expected at any moment, for the tribulation may already be occurring.

Overall, I personally find the Mid-Tribulation to be weak.